共找到 8 条结果
Scientists studying axolotls, zebrafish, and mice have uncovered a shared set of genes that may one day help humans regrow lost limbs。 By identifying powerful “SP genes” involved in regeneration, researchers discovered that disabling these genes stopped proper bone regrowth in salamanders and mice。 They then used a gene therapy inspired by zebrafis
Humans may have returned to Britain far earlier than scientists once believed — not long after the last ice sheet began retreating。 New evidence suggests people were already moving into the British Isles around 15,200 years ago, tracking herds of reindeer and horses across a landscape that was suddenly becoming warmer and greener
The Toba supereruption 74,000 years ago was so massive it may have plunged Earth into years of darkness and cold, leading some scientists to believe humanity nearly went extinct。 Yet archaeological evidence from Africa and Asia suggests early humans were far more resilient than once thought。 Instead of disappearing, some communities adapted with ne
Scientists in China discovered that ancient humans were making surprisingly advanced stone tools during a harsh ice age 146,000 years ago。 The tools, created by Homo juluensis, show careful planning and complex thinking rather than simple stone-chipping。 Researchers dated the site using tiny calcite crystals inside animal bones, revealing the tools
A powerful new electromagnetic thruster has taken a major step forward after a successful high-energy test at NASA’s Jet Propulsion Laboratory。 Fueled by lithium vapor and driven by intense magnetic forces, the experimental engine reached record-breaking power levels—far beyond anything currently used in space。 Glowing hotter than molten lava and f
Experts and college students used A。 agents to try to break into and defend computer networks in a national competition。 The agents did all right on their own, too
Scientists may have found a smarter, safer way to wipe out termites hiding inside homes。 A chemical called bistrifluron prevents drywood termites from forming new exoskeletons during molting, killing entire colonies from within。 In tests, it eliminated about 95% of termites while avoiding the toxic side effects of traditional fumigation
A bold step toward returning humans to the Moon is underway with Blue Origin’s uncrewed MK1 “Endurance” lander, designed to test the technologies that future astronauts will rely on。 Built in partnership with NASA, the mission will showcase precision landing, autonomous navigation, and advanced cryogenic propulsion—key capabilities for operating on