2026-08-15の世界

A giant tree that has grown in Madagascar for centuries just got a brand-new scientific name. Researchers at the University of Wisconsin-Madison, working with the Missouri Botanical Garden and Iowa State University, studied baobab trees across the island using detailed genetic analysis. The team collected tissue samples from remote areas and compared hundreds of genes across different populations. They found that baobabs from northern Madagascar, long assumed to belong to the species Adansonia za, were genetically distinct enough to form their own species. The newly named tree is called Adansonia bozy. With this discovery, the number of known baobab species rose from 8 to 9: 1 in Australia, 1 in mainland Africa, and 7 now found in Madagascar. Baobabs are famous for their huge trunks, which can store thousands of liters of water, and for flowers that bloom for just one night, opening after dusk more than 30 meters above the ground. Scientists already consider Adansonia bozy critically endangered because of its small population and ongoing deforestation. Lead researcher Nisa Karimi said naming a species precisely is an essential first step toward protecting it, since conservationists cannot save a tree they cannot properly identify.

Engineers at the University of Illinois Urbana-Champaign have built a tiny molecule that could make recycling gold from old electronics much cleaner. Discarded phones, computers, and circuit boards contain valuable metals, including gold, but pulling that gold out usually requires large amounts of harsh chemicals. The new molecule, led by professor Xiao Su and researchers Deborah Schmitt and Aderiyike Aguda, solves that problem in an unusual way. It can grab onto metal ions, carry a permanent electrical charge, and stay dissolved in the extraction liquid, all at the same time. Because the molecule already carries its own charge, electricity alone can control when it grabs metal ions and when it releases them. In laboratory tests, the team used this method to pull gold directly out of liquid made from dissolved electronic waste. The system cut the amount of chemical reagents needed by 1 to 2 orders of magnitude, meaning up to 100 times less chemical waste than older methods. Su called it the first time his team could run this kind of extraction exactly the way they had imagined. Around 90 percent of the gold used inside electronics currently ends up buried in landfills across the United States every year, so cleaner recovery methods could matter for future recycling.

A high school pitcher just threw the fastest ball ever recorded at Japan's most famous baseball tournament. On August 14, Yokohama High School's ace, Oda Shoki, was called in to relieve in the sixth inning of a second-round game against Nichinan Gakuen at Koshien Stadium. The score was tied at 1 run apiece, and the bases were loaded with no outs. Oda's third pitch of the inning hit 156 kilometers per hour on the stadium radar gun, setting a new all-time speed record for the spring and summer Koshien tournaments. The previous record of 155 kilometers per hour had stood for 19 years, shared by three different pitchers since 2007. Oda struck out the batter he was facing with a 155 kilometer per hour pitch on the very next throw, then got a double play on a 149 kilometer per hour pitch to escape the inning without allowing a run. Yokohama went on to win the game, 10 to 1. Interestingly, one pitcher's fastball was unofficially clocked even faster back in 2001, at 158 kilometers per hour on a scout's personal radar gun, but the stadium's own display showed only 154 kilometers per hour that day, so it never counted as the official record.

Scientists have found a clever way to count sharks that lived thousands of years ago, using scales too small to see without a microscope. Sharks constantly shed tiny tooth-like scales called dermal denticles, and these scales settle into ocean sediment, where they can survive for thousands of years. Researchers at the Smithsonian Tropical Research Institute, led by Erin Dillon and Aaron O'Dea, collected 157 sediment samples from reefs in Panama, a country with coastline on both the Caribbean Sea and the Pacific Ocean. In total, they sorted through 3,497 denticles, comparing samples from 7,000 to 3,000 years ago with samples from the past century. The results, published in the journal Science, showed that prehistoric Pacific reefs supported roughly 20 times more sharks than Caribbean reefs at the same time. Denticle numbers in the Caribbean have since dropped by about 75 percent, while Pacific numbers have barely changed from their ancient levels, even though the Pacific side now receives more than 98 percent of Panama's fishing pressure. The team believes nutrient-rich waters welling up from the deep in the Pacific help support far more sharks and other big predators than the calmer Caribbean side ever could.

A rare kind of eclipse just swept across the far north of Europe, and sky watchers are still talking about it. On August 12, the Moon completely blocked the Sun along a narrow path that crossed Greenland, Iceland, northern Russia, the Atlantic Ocean, Spain, and a small part of Portugal. It was the first time the path of totality had crossed continental Europe since 1999. Along the center of that path, the Sun stayed fully hidden for a little less than two minutes, and viewers near Greenland, Russia, and the North Atlantic saw totality last almost two and a half minutes. For sky watchers farther west, in parts of mainland Europe and Africa, the eclipse created a special sight: the Sun set while it was still partly covered by the Moon, a rare sunset eclipse. NASA reminded everyone that looking directly at the Sun is only safe during the brief minutes of full totality. At every other moment, viewers needed certified eclipse glasses that meet the ISO 12312-2 safety standard. For millions of people, the eclipse offered a rare chance to see day briefly turn to night.

Sixty-two big cats are finally getting a fresh start after years stuck in a notorious closed zoo in Argentina. Officials shut down the former Luján Zoo, northwest of Buenos Aires, back in 2020 because of serious concerns about animal welfare. The international group Four Paws took over full responsibility for the animals in September 2025 and has spent months preparing them for the journey ahead. This month, keepers began loading 32 lions, 30 tigers, and 2 bears into transport crates for one of the largest big cat relocations ever attempted. Fifteen lions and tigers are heading to the LIONSROCK sanctuary in South Africa, another fifteen are going to the Wild Animal Sanctuary in Colorado, and the two bears are bound for BEAR SANCTUARY Belitsa in Bulgaria. Many of the animals arrived with kidney and liver problems, broken teeth, and paws still healing from being declawed as cubs. Four Paws called the mission one of its largest and most complex emergency operations to date. More than twenty lions and tigers still remain at the old zoo site while the group searches for permanent homes for them too.

Kyoto is preparing for one of its most famous summer traditions, a night when five giant bonfires light up the mountains around the city. On August 16, starting at 8 p.m., fire crews will ignite five huge shapes cut into the hillsides one after another, five minutes apart. The character Daimonji, meaning great, lights first at 8 p.m., followed by Myo-Ho at 8:05, Funagata, shaped like a boat, at 8:10, Hidari Daimonji at 8:15, and finally Toriigata, shaped like a shrine gate, at 8:20. Each fire burns for about thirty minutes before it dies down. The custom is known as Gozan Okuribi, and it marks the end of Obon, the summer holiday when Japanese families welcome home the spirits of their ancestors. Lighting the fires is a way of sending those spirits back to the other side in peace. The tradition is believed to have taken its modern form sometime during the Muromachi and Edo periods, centuries ago, though its exact origin is still debated. Locals and visitors alike gather along the Kamo River and rooftops across Kyoto each year to watch the mountains glow.

A dolphin-shaped sea creature that swam the oceans 150 million years ago has just been given a name, after hiding in plain sight inside a German museum collection for decades. Scientists studying fossils at the Bavarian State Collection for Palaeontology and Geology and the Jura-Museum Eichstätt found that some specimens long labeled as a known species, Aegirosaurus leptospondylus, actually belonged to something new. Researchers led by Dr. Erin Maxwell at the Natural History Museum Stuttgart named the animal Jabalisaurus tethyensis. It was an ichthyosaur, a marine reptile that looked similar to a modern dolphin, and it grew between 2 and 2.9 meters long. Its slender, high-crowned skull and finely ridged teeth suggest it hunted small bony fish in the warm waters of the ancient Tethys Ocean. The most surprising part of the discovery involves geography. The only other known Jabalisaurus fossils come from the Gulf of Mexico, roughly 9,000 kilometers away. That distance suggests this type of ichthyosaur swam across a huge stretch of ocean rather than staying in one small area. The findings, published on August 11 in the journal Palaeontologia Electronica, show that older museum drawers can still hold brand-new species.