Darwin wasps were thought to prefer temperate areas. But researchers scoured a mountain in the Brazilian tropics and found nearly a hundred species.
The insects seem to sip from nowhere else on frogs’ bodies. Thinner skin or denser blood vessels near the nostrils might explain why.
Male serotine bats have penises too large for penetration. To mate, the animals rub their genitals against each other, somewhat like birds’ cloacal kiss.
The automated device pairing brain activity and dosing kept two macaques sedated for 125 minutes, raising hopes of precision anesthesia for people.
Mouse embryos in space can develop into clusters of cells called blastocysts. The result is a step toward understanding how human embryos will fare.
A new study is the most comprehensive analysis yet of the evolution of “true crabs.”
In his debut book, Noah Whiteman tours through chemistry, evolution and world history to understand toxins and how we’ve come to use them.
Cooperation between unrelated individuals in different groups without clear and immediate benefit was thought to be uniquely human. Its presence in bonobos may help explain its evolution.
A study that followed hundreds of teenagers during the COVID-19 pandemic may explain why some people succumb to stress while others are more resilient.
