Storied spawning runs of European eels may not be an en masse push to a mating site. Roundabout routes may delay many eels so much that they miss the big event and have to wait to mate until next season. The most extensive reconstructions of individual eel journeys challenge an assumption that Europe’s freshwater eels […]

A 6-month-old baby boy may have opened the door to a new world of reproductive medicine. He is the first person born from a controversial new technique for preventing mitochondrial diseases by creating a “three-parent baby” — a child in which the vast majority of DNA comes from the mother and father and a small […]

PASADENA, Calif. — Jupiter’s clouds have deep roots. The multicolored bands that wrap around the planet reach hundreds of kilometers down into the atmosphere, NASA’s Juno spacecraft reveals, providing an unprecedented peek into the giant planet’s interior. “Whatever’s making those colors and stripes still exists pretty far down,” planetary scientist Scott Bolton, head of the […]

Australia’s early settlers hit the ground running, or least walking with swift determination. After arriving on the continent’s northwest coast by around 50,000 years ago, humans reached Australia’s southeastern interior within a thousand years or so, researchers find. This ancient trip covered more than 2,000 kilometers through terrain that, although stark and dry today, featured […]

A bizarre new birdlike dino was part of an evolutionary extravaganza at the end of the age of dinosaurs. And it was a real stick-in-the-mud, too. Construction workers blasted Tongtianlong limosus out of the Earth near Ganzhou in southern China. “They very nearly blew this thing to smithereens,” says paleontologist Stephen Brusatte of the University […]

Unseasonable shrinking of sea ice could trigger another peril of climate change: increasing ice-overs on land that starve reindeer and threaten Siberian herders’ way of life. The worst of these events in the memory of Nenets herders on Russia’s Yamal Peninsula killed 61,000 of 275,000 reindeer in 2013, a blow to the herders’ livelihood that […]

Living on the bottom rungs of the social ladder may be enough to make you sick. A new study manipulating the pecking order of monkeys finds that low social status kicks the immune system into high gear, leading to unwanted inflammation akin to that in people with chronic diseases. The new study, in the Nov. […]

Meet the robot that can do parkour. Salto, a lightweight bot that stands on one skinny leg like a flamingo, can leap from floor to wall, then off again — like parkour athletes bouncing between buildings, researchers from the University of California, Berkeley report December 6 in Science Robotics. Salto’s not the highest jumping robot […]

Narrow channels of moisture snaking through the atmosphere can bring storms that wreck beachfront bungalows — and leave oyster beds bare. Several of these channels, called atmospheric rivers (SN: 2/26/11, p. 20), dumped particularly heavy storms on California in early 2011. The resulting freshwater influx probably left part of the San Francisco Bay without enough […]

Pregnancy changes nearly everything about an expectant mother’s life. That includes her brain. Pregnancy selectively shrinks gray matter to make a mom’s brain more responsive to her baby, and those changes last for years, scientists report online December 19 in Nature Neuroscience. “This study, coupled with others, suggests that a woman’s reproductive history can have […]