A physicist, a chemist and a mathematician walk right into a bar. It appears like the beginning of a nasty joke, but in my case it was the beginning of an idea that might change the best way scientists think concerning the history of the moon.

The three of us were all involved in the moon, but from different perspectives: As a geophysicistI thought of his insides; Thorsten Kleine studied his chemistry; And Alessandro Morbidelli desired to know what the formation of the moon could tell us how the planets were put together 4.5 billion years ago.

When we got here together to debate how old the moon really was, having these diverse perspectives proved crucial.

How was the moon formed?

At a Conference in Hawaii At the top of the Nineteen Eighties, a bunch of scientists solved the issue of the formation of the moon. Their research suggested that a Mars-sized object crashed into early EarthMolten material is thrown into space. This glowing material coalesced into the body now called the moon.

This story explained many things. For one thing, the moon has little or no Material that evaporates easilylike water, because life began to melt. It only has one tiny iron coresince it was largely formed from the outer a part of the earth, which accommodates little or no iron. And it has a buoyant, white coloured crust Minerals that floated to the surface because the molten moon solidified.

The vibrant, newly formed moon was initially very near Earth approximately the space that television satellites orbit. The early Moon would have triggered gigantic tides on the early Earth, which itself was mostly melted and spinning rapidly.

These tides extracted energy from Earth's rotation and transferred a few of it to the Moon's orbit, slowly pushing the Moon away from Earth and slowing Earth's rotation in the method. This movement continues to at the present time – the moon continues to be moving away from the Earth 2 inches per 12 months.

As the moon moved away, it passed certain points where its orbit was momentarily perturbed. These orbital perturbations were a very important a part of its history and a central a part of our hypothesis.

When was the moon created?

When the moon actually formed and moved away from Earth is a difficult query.

Thanks to the Apollo astronauts, scientists have one Collection of moon rockswhose age they’ll measure. The oldest rocks are all about 4.35 billion years oldi.e. about 200 million years after that Birth of the solar system.

Many geochemists, like my colleague Thorsten Kleine, suspected (not without reason) that the age of those rocks corresponds to the age of the moon.

But people like Alessandro Morbidelli, who study planet formation, didn't particularly like that answer. In their models, planets swept up many of the matter floating across the early solar system long before 200 million years had passed. An enormous, moon-forming impact at a later date than the rock samples suggested seemed fairly unlikely.

What did we advise?

This is where Kleine, Morbidelli and I got here into play. We followed up on a suggestion from a 2016 study that found the moon could occasionally experience extreme warming events during its slow journey outward from Earth.

This warming occurs in the identical way because the warming on Jupiter hyperactive volcanic moon Io. The shape of the smaller body is compressed and stretched by the tides of the larger body. And just as a rubber ball heats up if you squeeze it enough, the rocks on Io and the Moon also heat up.

All rocks contain small internal clocks – radioactive elements that decay and permit researchers to decay Tell me how old the stone is. But here's the important thing point: If the moon warmed enough, its clocks would lose their memory and only start keeping time once the moon cooled again.

In this image, the gathering of roughly 4.35 billion-year-old rocks doesn't tell us when the moon was formed, only when it underwent this tidal warming. This signifies that the moon's formation will need to have occurred earlier.

An early date of formation satisfies physicists studying planet formation, while also explaining that the later dating determined from the rocks is resulting from it Tidal warming.

What's next?

As is usually the case in science, two groups got here up with the same idea at the identical time. During the research, our group focused on a tidal warming event that occurred when the Moon was quite removed from Earth Steve Desh at Arizona State University points to an event that took place when the moon was closer. It will take time to work out which of those two hypotheses is correct – and maybe neither is correct.

To test these hypotheses, more samples from the Moon are needed. Fortunately, China's Chang'e Mission 6 I just returned samples from the dark side of the moon in June 2024. If these samples also show many rocks, throughout 4.35 billion years old, that will be consistent with our story. When the ages are much older, we’ve to think up a brand new story.

Very often geochemists and geophysicists find yourself in earth and planetary sciences different and contradictory hypotheses. This is partly because these fields use several types of measurements, but in addition because they speak very different scientific languages. Overcoming this language barrier is difficult.

Our study is an example of how – sometimes – bridging this linguistic and scientific divide can profit researchers on either side.

DELANO – A Bay Area native who previously allegedly killed the co-founder of a notorious skinhead group in Orange County was killed in his jail cell, authorities announced Friday.

Jacob Kober, 35, was stabbed multiple times in his cell at Kern Valley State Prison on Thursday, authorities said. His cellmate, 39-year-old Matthew Perez, also suffered injuries consistent with a “prison-made weapon,” in keeping with a news release from the California Department of Corrections and Rehabilitation.

Authorities said only Kober and Perez were within the cell on the time of the murder.

Known as an area methamphetamine and marijuana dealer within the Livermore area in 2015, Kober was serving a life sentence for killing a longtime friend on the fourth hole of a golf course. But in 2018, he was again implicated in murder, this time for a jail stabbing that had repercussions throughout the state's prison system.

The victim was 48-year-old Devlin Stringfellow, an Orange County native and co-founder of the skinhead gang Public Enemy Number One, or PENI. Prosecutors now say his murder was ordered by an Aryan Brotherhood member named William Sylvester, who was convicted of organized crime last April and now faces a life sentence.

Prosecutors say Stringfellow's 2018 murder was a typical Aryan Brotherhood attack. It happened during a training exercise at California State Prison in Sacramento. Someone hit Stringfellow on the pinnacle with a rock to stun him, then Kober and 49-year-old Stephen Dunckhurst allegedly stabbed him, in keeping with testimony at a trial of Sylvester and two other Aryan Brotherhood members.

While awaiting trial, Sylvester reportedly boasted to other co-defendants about ordering Stringfellow's death. Another PENI co-founder, Donald “Popeye” Mazza, later agreed to testify for the federal government, partly due to his grief over Stringfellow's death, Mazza said during his testimony on the organized crime trial.

Kober was sentenced to life in prison in 2015 for killing his friend Kenneth Robert Ogden, 28, amid mounting tensions between the 2 men. Kober had previously accused his girlfriend of getting sex with Ogden, and in addition they had a dispute over money, authorities said on the time. Kober made his money selling drugs and lived just yards from the fourth hole of a close-by golf course, where Ogden's body was found, court records show.

According to authorities, Perez was serving a jail sentence for assault with a firearm and gang activity.

Originally published: September 20, 2024 at 3:25 p.m.

“Core on deck!”

For two months, each time I heard that scream, I ran to the deck of the JOIDES Resolution to observe the crew hoist up a ten-meter-long cylindrical tube stuffed with layered, colourful rock and sediment they’d drilled from the seabed beneath our ship.

In the winter of 2022, I spent two months cruising the southern Aegean Sea aboard the International Ocean Discovery Program's JOIDES Resolution as a part of IODP Expedition 398. My fellow geologists and I used this former oil exploration vessel to drill deep into the seabed and uncover the volcanic history of the world off the coast of Santorini, Greece.

As a scientist who investigates the chemistry of volcanic rocksI exploit my expertise to correlate volcanic deposits with the eruption that caused them and to know the conditions magma was exposed to each deep beneath a volcano and through an eruption.

Our expedition’s drilling on the ocean floor revealed a massive but previously unknown volcanic eruption which occurred greater than 500,000 years ago. This discovery expands our understanding of the volcanic activity within the chain of volcanoes that South Aegean Volcanic Arcwhich is able to enable a more accurate hazard evaluation of this region.

Building a more comprehensive volcanic history

Archaeologists have long been fascinated by the eruption of Santorini within the late Bronze Age around 1600 BC. This eruption is related to the decline of the Minoan Civilization on the nearby island of Crete. Geologists even have great interest within the region attributable to the volatility of volcanic and seismic activity in the world, which is about 15,000 inhabitants and pulls around 2 million tourists per yr.

Although there’s extensive documentation of Santorini volcano on land, scientists realize it is incomplete. On land, older volcanic deposits are sometimes covered or obscured by erosion, vegetation and extra eruptions, leading to a fragmentary history. The deep-sea drilling enabled by the IODP's JOIDES resolution gives researchers access to a geological documentation rarely preserved on land.

After a volcanic eruption, pyroclastic materials – rock fragments and ash formed through the eruption – settle through the water column and collect on the ocean floor. There, clay and biological material, akin to the shells of tiny marine organisms, continually rain down and canopy the volcanic rock deposits. This process preserves the record of a single eruption as a single layer. The layers construct over time, with each successive volcanic event creating an almost continuous chronological record of the region's volcanic history.

The mission of Expedition 398 was to access these deep-sea records to document the extensive history of eruptions in each area of ​​concentrated volcanic activity.

IODP Expedition 398

IODP Expedition 398 collected cores to raised understand the volcanic history and return interval of the Santorini, Christiana and Kolumbo volcanoes on this region. The JOIDES Resolution crew drilled at 12 locations to a maximum depth of 900 meters below the seafloor. We recovered a complete of over 780 cores with a complete length of greater than 3,356 meters.

While technicians cut the core into 1.5-meter-long sections, scientists gathered to see what material had been recovered. After subjecting the cores to surface pressure, the team split them lengthwise, photographed them, analyzed them for physical properties akin to magnetic susceptibility, and described the fabric. Core describers measure and document the geological composition of every rock unit contained inside.

As head of the geochemistry lab, I took small samples from multiple layers of volcanic rock and ash to dissolve and analyze them for his or her trace element composition. During an eruption, magma crystallizes and mixes with elements within the water and rock it comes into contact with. The resulting chemical changes within the magma are unique to the conditions of that specific eruption, so once I determine the chemical composition of the deposit samples, I can determine their volcanic origin.

Our discovery: The Archaeos Tuff

During the expedition, our research group discovered a thick, white layer of pumice in several places in numerous basins. Biostratigraphy each occurrence of the layer was dated to the identical age: between 510,000 and 530,000 years ago. Geochemical correlations suggested that the composition was also the identical in all boreholes.

Finding the identical layer in these basins allows our research team to model how large the eruption that caused it might need been. Using the seismic data collected through the expedition, we were in a position to determine that the full volume of volcanic sediment is about 90 cubic kilometers, and in some places it’s as much as 150 meters thick. In addition, we found that this layer of volcanic rock was distributed over 3,000 square kilometers of this region within the southern Aegean.

Our team named this accretion Archaeus Tuff, after the Greek word Archaea for ancient. The name reflects the Greek origin of the rock and the proven fact that it was much older than much of the volcanic activity we all know of on land.

The properties of the Archaeos tuff help us understand the character of the volcanic eruption that formed it. Its thickness and distribution over a large area suggest that the Archaeos tuff is the results of a single, high-intensity eruption. The quite a few bubbles, or tiny holes, within the rock indicate that a considerable amount of gas was released similtaneously the liquid magma. These small gas bubbles paint an image of a robust eruption that released a considerable amount of volatile gas quite quickly.

Yet, despite its apparent size and ferocity, this eruption didn’t correlate with previously known land deposits or large eruptions. The relative lack of fabric on land suggests a primarily submarine eruption. Once we knew what we were searching for, our team was in a position to match our newly discovered deep-sea layer of volcanic sediment with some small, previously uncorrelated land deposits on the islands of Santorini, Christiana, and Anafi. The presence of those deposits suggests a breach of the ocean surface through the eruption, which again suits our picture of a high-energy eruption.

Further studies of the composition and age of the Archaeos Tuff confirmed the distinctiveness of the rock deposit left by this eruption. Based on the info we collected, our team believes that the Archaeos Tuff is the results of an eruption six times larger than the Bronze Age Minoan eruption and left rock deposits 30 times thicker. The presence of such a big volcanic deposit tells us that the South Aegean Volcanic Arc is more capable of manufacturing large submarine volcanic eruptions than scientists previously thought.

The identification of the Archaeos tuff expands our knowledge of volcanic processes within the southern Aegean. It suggests that the danger of submarine volcanism is larger than previously thought – and that authorities must reassess the volcanic hazards to the encircling population.

The federal judge who’s hearing the classified documents case against former President Donald Trump dismissed the case on July 15, 2024.

Trump-appointed U.S. District Judge Aileen Cannon ruled that special counsel Jack Smith, who’s leading the prosecution, was improperly appointed to office and didn’t have the authority to bring the case to trial.

Here's how the federal government has used special prosecutors in high-profile investigations over time and the way Cannon's ruling, which Smith said, he’s appealingwould affect ongoing and future cases.

A transient history of independent legal advisers

Ensuring impartiality within the U.S. Department of Justice may be difficult since the attorney general is appointed by and accountable to a partisan president, giving presidents the facility to influence the attorney general to pursue a political agenda.

president Richard Nixon did so through the investigation of the Watergate break-inwhich threatened him with involvement in criminal activities and the top of his presidency.

On the evening of October 20, 1973Nixon ordered the Attorney General Elliot Richardson to fireplace Archibald Coxwhom Richardson had appointed to steer the Watergate investigation. Richardson refused and resigned.

Nixon then ordered the Deputy Attorney General William Ruckelshaus Cox. Ruckelshaus also refused and resigned. Finally, Nixon ordered the Solicitor General Robert Borkthe subsequent highest official within the Justice Department, demanded that Cox be fired. Bork complied.

This dramatic series of events, sometimes called Saturday Night Massacredemonstrated how presidents can exert political influence on federal criminal investigations.

After the Watergate scandal taken under consideration Bill to rework the Justice Department into an independent agency to higher protect it from presidential influence.

This would have been consistent with the unique intentions of lots of the Founding Fathers. But Congress opted for a more modest reform and passed the Ethics in Government Act of 1978which was enacted by President Jimmy Carter and created the Office of Independent Counsel.

This enabled investigations into misconduct, beyond the control of the President The Attorney General could appoint a special panel of three judges to appoint an independent lawyer to conduct the investigation.

The Government Ethics Act In addition, Justice Department employees, including the Attorney General, were barred from participating in any investigation or prosecution that might lead to “a personal, financial, or political conflict of interest, or the appearance of such” for the investigator.

The US Supreme Court has already supported legal counsel

Just a few years later, the Reagan administration argued that independent consultants were unconstitutional. Their reasoning was that the law violated the Appointment clause of Article II, Section 2, Clause 2 of the Constitution, which states that “Officers of the United States” shall be “appointed by the President,” and “subject to the Advice and Consent of the Senate.”

In 1988The Supreme Court ruled that independent legal advisors are constitutionalsince the Appointments Clause also states that “Congress may delegate the appointment of inferior officers to the President, the Courts, or the heads of departments alone.”

Essentially, the Supreme Court ruled that appointees could possibly be considered either “principals,” who should be appointed by the President and confirmed by the Senate, or “inferior” appointees, who could possibly be appointed by a department head, akin to the Attorney General, or by judges.

The Supreme Court ruled that a “independent legal counsel should be considered as subordinate and not as primary responsible.”

Creation of special advisors

In 1999, the Ethics in Government Act – the one Sunset clause – needed to be renewed.

At that time, each parties and their presidents had been humiliated by previous investigations by independent lawyers. The Republicans were shocked by the Iran-Contra scandalwhile the Democrats were ashamed of the Monica Lewinsky scandal.

It was also unclear which party would win the White House within the upcoming 2000 elections, and neither party wanted the opposite to have a bonus in the long run. During this stalemate, each parties decided to easily let the Government Ethics Act expirewhich might end the potential for appointing future independent advisers.

Later that yr, then-Attorney General Janet Reno said authorized the appointment of so-called special investigators who could investigate certain sensitive matters, much like the way in which independent investigators work.

Robert Mueller was a special counsel appointed by Deputy Attorney General Rod Rosenstein. 2017 to analyze possible Russian interference within the 2016 election and possible links between the Trump campaign and the Russian government.

John Durham was appointed by Attorney General Bill Barr in 2020 to analyze the origins of the investigation that led to Mueller's appointment.

In 2022 Michael Smith was appointed special counsel by Attorney General Merrick Garland to oversee investigations into former President Donald Trump's role within the January 6 riot and Trump's handling of classified government documents after he left office in 2021.

In 2023, Garland appointed Robert Hur as special counsel to analyze President Joe Biden's handling of classified information after he left office as vice chairman in 2017.

Also in 2023, Garland appointed David Weiss as special counsel to analyze Hunter Biden's illegal gun purchases and tax-related issues.

Impact beyond Trump

In early July 2024, the Supreme Court governed that past, current and future presidents enjoy partial immunity from prosecution.

Although the legality of special counsel was not at issue on this case, Judge Clarence Thomas used his consensus to challenge the legality of Smith's appointment. Thomas argued that Congress had not passed a law giving the Attorney General the authority to appoint a special counsel.

Thomas noted that the Ethics in Government Act of 1978 had “expired” and that Congress had not reauthorized the appointment of an independent counsel since then. Thomas subsequently questioned the authority of attorneys general to appoint special counsels.

In its 93-page decision Judge Cannon dismissed the case against Trump, repeating Thomas' argument.

Cannon asked whether there may be “a statute in the United States Criminal Code that would allow the appointment of Special Counsel Smith to conduct this prosecution?”

Then she answered her own query.

“After carefully examining this fundamental question, the answer is no,” she wrote.

Cannon's decision may be appealed to the Supreme Court, and if that happens, the end result could affect greater than just Trump's classified documents case.

According to Cannon’s ruling, all special prosecutors, including those investigating Joe and Hunter Bidenmay be deemed unconstitutional.

Editor's note: This story comprises material from a previous story published on December 14, 2022.

Today the atmosphere of our neighboring planet Venus is as hot as a… Pizza oven and drier than that driest desert on earth – but that wasn’t all the time the case.

Billions of years ago, Venus had as much water as Earth has today. If this water was ever liquid, Venus may once have been habitable.

Over time, this water has been almost completely lost. It helps to learn how, when and why Venus lost its water Planetary scientists like me Understand what makes a planet habitable – or what could cause a habitable planet to show into an uninhabitable world.

Scientists have theories that designate why many of the water has disappeared, but more water has disappeared than they predicted.

In a May 2024 studymy colleagues and I actually have revealed a brand new water removal process that went unnoticed for a long time but may explain this water loss mystery.

Energy balance and early water loss

The solar system has one habitable zone – a narrow ring across the sun wherein planets can have liquid water on their surface. Earth is in the center, Mars is out on the too cold side, and Venus is out on the too hot side. Where a planet sits on this habitability spectrum will depend on how much energy the planet receives from the Sun and the way much energy the planet radiates.

The theory as to how most of Venus's water loss occurred is said to this energy balance. On early Venus, sunlight split the water in its atmosphere into hydrogen and oxygen. Atmospheric hydrogen heats up a planet – like having too many blankets in your bed in summer.

When the planet gets too hot, it throws off the quilt: the hydrogen escapes into space in a stream, a so-called process hydrodynamic escape. Through this process, Venus was deprived of one among the foremost components of water. It is unknown Exactly When This process occurred, but probably inside the first billion years or so.

After many of the hydrogen was removed, hydrodynamic escape stopped, but some hydrogen remained. It's like pouring out a water bottle – there’ll all the time be a number of drops left at the underside. These leftover drops cannot escape in the identical way. There should be one other process occurring on Venus that continues to remove hydrogen.

Small reactions could make a giant difference

Our New study shows that an ignored chemical response in Venus' atmosphere may produce enough escaping hydrogen to shut the gap between expected and observed water loss.

This is how it really works. In the atmosphere, gaseous HCO⁺ molecules, which consist of 1 atom each of hydrogen, carbon and oxygen and are positively charged, mix with negatively charged electrons because opposites attract.

But when the HCO⁺ and electrons react, the HCO⁺ breaks down right into a neutral carbon monoxide molecule, CO, and a hydrogen atom, H. This process prompts the hydrogen atom, which might then exceed the planet's escape velocity and escape into space. The entire response is known as HCO⁺ dissociative recombination, but we prefer to call it DR for brief.

Water is the unique source of hydrogen on Venus, so DR effectively dries out the planet. DR has likely existed throughout Venus' history, and our work shows that it likely continues into the current. This doubles the quantity of hydrogen escaping previously calculated by planetary scientists who’re turning our understanding of today's hydrogen leaks on Venus the other way up.

Understanding Venus with data, models and Mars

To study DR on Venus, we used each computer modeling and data evaluation.

The modeling actually began as a Mars project. My Ph.D. The research involved studying the conditions that make planets habitable for all times. There was once water on Mars tooalthough lower than Venus, and likewise lost most of it to space.

To understand hydrogen escape on Mars, I developed one Computational model of the Martian atmosphere that simulates the atmospheric chemistry of Mars. Although Mars and Venus are very different planets, they really have similar upper atmospheres, so my colleagues and I were in a position to extend the model to Venus.

We found that dissociative recombination of HCO⁺ within the atmospheres of each planets produces a whole lot of escaping hydrogen, consistent with the planet's measurements Mars Atmosphere and Volatile EvolutioN or MAVEN missiona satellite orbiting Mars.

It can be invaluable to gather data in Venus' atmosphere to support the model, but previous missions to Venus didn’t measure HCO⁺ – not since it wasn't there, but because they weren't designed to detect it. However, they measured the reactants that produce HCO⁺ in Venus' atmosphere.

By analyzing measurements prepared by Pioneer Venusa combined orbiter and probe mission that studied Venus from 1978 to 1992, and using our knowledge of chemistry, we’ve got shown that HCO⁺ must be present within the atmosphere in quantities much like those in our model.

Follow the water

Our work has solved a part of the mystery of how water is lost from planets, which affects how habitable a planet is for all times. We learned that water loss doesn't just occur , but over time through a mix of methods.

Today's faster lack of hydrogen from DR implies that overall it’s going to take less time to remove the remaining water from Venus. This implies that if oceans were ever present on early Venus, they could have been present longer than scientists thought before water loss through hydrodynamic escape and the DR began. This would give more time for possible life to emerge. However, our results don’t mean that there have been definitely oceans or life – answering this query would require far more science for a few years to return.

There can also be a necessity for brand new Venus missions and observations. Future Venus Missions will provide some atmospheric measurements, but they may not give attention to the upper atmosphere, where most HCO⁺ dissociative recombination occurs. A future Venus upper atmosphere mission, much like the MAVEN mission on Mars, could significantly expand everyone's knowledge of how the atmospheres of terrestrial planets form and evolve over time.

With technological advances in recent a long time and a growing latest interest in Venus, now is a wonderful time to show our attention to Earth's sister planet.