World's oldest known case of cannibalism revealed in trilobite fossils

World's oldest known case of cannibalism revealed in trilobite fossils | Russia could end its role in the International Space Station by 2024, say experts | Charles Darwin's stolen 'tree of life' notebooks returned after 20 years Created for {EMAIL} | [Web Version]( April 7, 2022 CONNECT WITH LIVESCIENCE  [Facebook]( [Twitter](  [LIVESCIENCE]( Amazing science every day [SIGN UP]( ⋅ [WEBSITE](  [] Top Science News [] [World's oldest known case of cannibalism revealed in trilobite fossils]( [World's oldest known case of cannibalism revealed in trilobite fossils]( (Aunt_Spray via Getty Images) It's a dog-eat-dog world out there. But before there were dogs — or even dinosaurs — there were trilobites brutally biting each other on the Cambrian seafloor. New research has revealed that these armored predators didn't only hunt smaller and weaker animals for food, but would occasionally take bites out of their trilobite comrades of the same species. This finding represents the earliest evidence of cannibalism in the fossil record to date. Trilobites are now-extinct marine arthropods that first appeared in the fossil record around 541 million years ago. They were stout creatures with thick exoskeletons, which is likely one of the reasons so many trilobite fossils remained preserved all these years; exoskeletons fossilize much easier than softer tissues. Full Story: [Live Science]( (4/6) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [Never Stop Learning]( From big space discoveries to ancient mysteries and future tech, our Knowledge magazines are packed with engaging, authoritative content for all ages. With expert editorial teams across history, science and technology, we have everything you need to feed your curiosity. [Subscribe today!]( ADVERTISEMENT [] Russia-Ukraine War [] [Russia could end its role in the International Space Station by 2024, say experts]( [Russia could end its role in the International Space Station by 2024, say experts]( (NASA) Russia could end its cooperation on the International Space Station in as little as two years, using the sanctions imposed on Russia over its invasion of Ukraine as an excuse, according to space experts. Most commentators characterize the threats by the director general of Russia's Roscosmos space agency to end its involvement with the orbital outpost as mere political bluster. But the threat to sever such relations could come to fruition, as some experts Live Science spoke to noted that Russia has only committed to the ISS project until 2024, rather than "after 2030" as had been proposed by NASA and other partners. Full Story: [Live Science]( (4/6) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] History & Archaeology [] [Charles Darwin's stolen 'tree of life' notebooks returned after 20 years]( [Charles Darwin's stolen 'tree of life' notebooks returned after 20 years]( (Stuart Roberts/Cambridge University Library) A pair of Charles Darwin's iconic notebooks have been returned to their rightful home more than 20 years after they were mysteriously stolen. The contents of the notebooks include the naturalist's first doodle of the "tree of life," which he sketched out decades before formulating his theory of evolution by natural selection. The notebooks are part of the Darwin Archive at Cambridge University Library in the U.K., which contains journals, manuscripts and more than 15,000 letters written by Darwin. The journals were originally stored in the library's high-security Special Collections Strong Rooms but were removed from storage in November 2000 for a photo shoot. Library officials assumed that the notebooks had been returned to safety after the photo shoot, but during a routine audit in January 2001, librarians discovered that the notebooks were missing. The library staff initially suspected that the notebooks had been misplaced, but in 2020, the staff conducted a new search for the documents — the largest in the library's history — and came up empty-handed. The library concluded that the notebooks had most likely been stolen, Live Science previously reported. Full Story: [Live Science]( (4/6) [LinkedIn]( [Twitter]( [Facebook]( [Email]( Featured Content Sponsored Content from Gigabyte [Unleash your full potential with Gigabyte Aero laptops]( With an industry-leading display, 11th Gen Intel chips, and Nvidia RTX 3000 series graphics cards, the Gigabyte AERO 17 HDR laptops have all the power gamers and creative professionals need, and more. [Read more and enter to win a Aero 17 HDR laptop]( [] Your Health [] [A woman would faint whenever she tried to stand. New implant lets her walk.]( [A woman would faint whenever she tried to stand. New implant lets her walk.]( (EPFL / JIMMY RAVIER) A rare disease caused a woman to faint every time she sat up or stood. Now, with a new device implanted in her spinal cord, she can stand and walk the length of two and a half football fields with a walker. Researchers recently used the same implanted device to treat three men with paralyzing spinal cord injuries, Live Science previously reported. In these patients, the implant stimulated specific nerves in the spinal cord that then activated muscles in the trunk and legs. This allowed the men to stand, walk and even cycle on a stationary bike. In the woman's case, the implant instead stimulates spinal nerves that cause arteries in the trunk and legs to constrict when activated. Normally, when she sits up or stands, the woman's blood pressure plummets and this often causes her to faint, due to inadequate blood flow and oxygen supply in the brain. By telling arteries in the lower body to constrict, the spinal implant prevents this drastic dip in blood pressure and thus prevents her from losing consciousness. Full Story: [Live Science]( (4/6) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] Astronomy & Astrophysics [] ['Magnetic anomalies' may be protecting the moon's ice from melting]( ['Magnetic anomalies' may be protecting the moon's ice from melting]( (NASA Goddard) In 2018, NASA astronomers found the first evidence of water ice on the moon. Lurking in the bottom of pitch-black craters at the moon's north and south poles, the ice was locked in perpetual shadow and had seemingly survived untouched by the sun's rays, potentially for millions of years. The discovery of water ice came with a fresh mystery, however. While these polar craters are protected from direct sunlight, they are not shielded from solar wind, waves of charged particles that gush out of the sun at hundreds of miles a second. This ionized wind is highly erosive and should have destroyed the moon's ice long ago, Paul Lucey, a planetary scientist at the University of Hawaii, told Science. And unlike Earth, the moon no longer has a magnetic shield to protect it from the brunt of these charged particles. How, then, had the moon's polar ice survived? A new map of the moon's south pole — and the strange pockets of magnetic field that lie there — may provide an answer. Full Story: [Live Science]( (4/7) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] Daily Quiz [] POLL QUESTION: How do magnetic anomalies on the moon stop lunar ice from melting? (Learn the answer [here]() [Vote]( [They actively cool the area around the ice, keeping it frozen]( [Vote]( [They deflect solar wind]( [Vote]( [They don't actually protect the ice - the ice doesn't melt because it's always in shadow](   [Sign Up]( | [Update Profile]( | [Unsubscribe]( [Privacy Policy]( | [Cookies Policy]( | [Terms and Conditions]( CONTACT US: [FEEDBACK](mailto:livescience@smartbrief.com) | [ADVERTISE]( Future US LLC © 1100 13th St. NW, Suite 1000, Washington, DC 20005