Even sperm gotta stick together. Bull sperm swim more effectively when in clusters, a new study shows, potentially offering insight into fertility in humans. In simulated reproductive tracts of animals…
Category: Life
Why traumatic brain injuries raise the risk of a second, worse hit
In a football game on September 25, Miami Dolphins quarterback Tua Tagovailoa got the pass off but he got knocked down. Fans watched him shake his head and stumble to…
Tree-climbing carnivores called fishers are back in Washington’s forests
Holding an antenna above his head, Jeff Lewis crept through an evergreen forest in the Cascade mountains, southeast of Seattle. As he navigated fallen fir logs and dripping ferns, he…
Tree-climbing carnivores called fishers are back in Washington’s forests
Holding an antenna above his head, Jeff Lewis crept through an evergreen forest in the Cascade mountains, southeast of Seattle. As he navigated fallen fir logs and dripping ferns, he…
How dormant bacteria spores sense when it’s time to come back to life
Bacteria go to extremes to handle hard times: They hunker down, building a fortress-like shell around their DNA and turning off all signs of life. And yet, when times improve,…
Pterosaurs may have evolved from tiny, fast-running reptiles
A mysterious ground-dwelling reptile unearthed in a Scottish sandstone over 100 years ago turns out to be part of a famous flying family. Tiny Scleromochlus taylori was a close relative…
Video captures young mosquitoes launching their heads to eat other mosquitoes
A kind of teenager mosquito can suddenly shoot its head forward from its body — stretching its neck into a skinny cord — to bite into another youngster. And that’s…
‘Wonderful nets’ of blood vessels protect dolphin and whale brains during dives
If you look at parts of the circulatory system of whales and dolphins, you might think that you are looking at a Jackson Pollock painting, not blood vessels. These cetaceans…
‘Wonderful nets’ of blood vessels protect dolphin and whale brains during dives
If you look at parts of the circulatory system of whales and dolphins, you might think that you are looking at a Jackson Pollock painting, not blood vessels. These cetaceans…
This spider literally flips for its food
For one tiny Australian spider, somersaulting is the secret to taking on ants twice its size. Ants — armed with powerful jaws and sometimes chemical weapons — are so dangerous…
