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NASA’s Perseverance Mars rover has uncovered evidence that a 245-foot-thick (75-meter-thick) stack of ancient rock on the rim of Jezero Crater was built by repeated asteroid impacts. Referred to as the “Broom Point member” by the rover’s science team, this sequence of layered bedrock is likely more than 3.9 billion years old, making it among the oldest terrain ever examined by a Mars rover.
When Flagler County deputies removed her from the cruiser to replace the cuffs, she grabs one of their arms, leading deputies to bring her to the ground
Occasionally, the sun unleashes powerful flares and coronal mass ejections, which hurl plasma and energetic particles into space. On the infant Earth, this solar activity drove cascades of atmospheric chemical reactions that may have helped form the building blocks of life. More recently, scientists have discovered that applying plasma to seeds in a controlled way can trigger similar activity, making them faster-growing and more resilient. Researchers at Nagoya University and Kyushu University in Japan have compiled a comprehensive review of this new field—termed “plasma agriculture”—as a potential sustainable solution to address global food shortages.
Defense attorneys said that delaying the trial would violate former San Antonio officer James Brennand’s right to a speedy trial in the 2022 shooting
Typically, astronomers identify comets by their distinct atmospheres, or comae, and their tails, which are created as the sun vaporizes a comet’s ice. These features emit a glow when sunlight bounces off dust and water droplets. As gas escapes the body of the comet, it also acts as a tiny thruster, subtly changing the comet’s path.
A new study reveals that two widely studied ultrathin superconducting materials are more sophisticated than they appear. Although they seem to behave like simple superconductors with a single energy gap, they actually contain two strongly interacting superconducting states that work together and disguise themselves as one. This finding resolves a long-standing mystery about how these materials behave, providing new insight into superconductivity that could help scientists design better superconducting materials for future technologies such as quantum computers, ultra-efficient electronics and advanced sensors.
The effects of extreme space weather may be larger than previously thought, research in the journal Nature reveals. The paper, titled “Regression to the mean can explain saturation of geomagnetic storms,” is led by Dr. Nithin Sivadas of NASA’s Goddard Space Flight Center and co-authored by Dr. Maria Walach from Lancaster University.
The European Space Agency’s Mars Express has spotted a swath of metallic-looking waves filling Mars’s large Kaiser Crater—an ancient and otherworldly dune field sculpted by wind.
Quantum materials could transform technologies ranging from powerful computers and ultrasecure communications to advanced energy systems. But there has always been one major obstacle.
Lindy Jones, 44, was behind the wheel when his passenger, Guy Rivera, opened fire on Det. Jonathan Diller in March 2024; Jones pleaded guilty to a weapons charge on June 24
European astronomers have conducted optical and radio observations of an enigmatic radio source designated GRS 0917+75. As a result, they found that GRS 0917+75 is a giant radio galaxy and determined its properties. The new findings were published July 3 on the preprint server arXiv.
Quantum computers promise to solve problems that would take even the fastest conventional supercomputers a vast amount of time, but the quantum information they store and process is extremely sensitive to even tiny disturbances from their surroundings. To keep these systems operating reliably, they need to be constantly recalibrated—interrupting their calculations in the process.
A team of astronomers has discovered a third planet orbiting the star Beta Pictoris. The new planet, Beta Pictoris d, is 100 times fainter than Beta Pictoris b—the first planet discovered in the same system—and is among the lightest exoplanets ever imaged from the ground. After spotting the planet using the European Southern Observatory’s Very Large Telescope (ESO’s VLT), the team found it had been hiding in archival observations spanning more than a decade.
Astronomers have used the ages of more than 155,000 stars in the Milky Way to independently estimate the age of the universe, and their findings may be good news for the standard cosmological model. The new research was reported in a paper submitted to the arXiv preprint server on July 1.
Astrobiology has long been split into two camps: a search for “biosignatures” and a search for “intelligence.” These look for very different things, but they also leave a huge gap in between. It took 3.5 billion years for us to go from the first microbe to a civilization that sent radio waves into the cosmos. Detecting life in between those stages is a relatively untouched aspect of astrobiology—which is also the focal point of a new paper, “Signs and Signatures of Intelligence,” available on the arXiv preprint server, by astrobiologist Julia DeMarines.
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