Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

For decades, scientists have relied on tree rings to estimate how long trees can live. But new research suggests that this widely used method may have been underestimating the lifespan of many ...

My colleague and I have published a new study of cactus flowers which may help explain the conundrum. For more than a century ...

The dinosaur lineage has provided us with some of the most truly terrifying animals to ever walk the planet. But we eventually learned that all birds are actually theropod dinosaurs. Looking at ...

Sharks might not be a natural biological group, with most species potentially closer kin to rays than to an oddball group of sharks.

Behind the stillness of desert landscapes, cacti appear to be changing in unexpected ways. The cactus on your windowsill may ...

The three-dimensional shape of a protein can be used to resolve deep, ancient evolutionary relationships in the tree of life, according to a new study. It is the first time researchers use data from ...

Add Yahoo as a preferred source to see more of our stories on Google. Mammals descend trees in different ways, and primates stand apart. (CREDIT: Andrew Mercer / Wikimedia Commons / CC BY-SA 4.0) A ...

A monkey descending a tree trunk often keeps its head up, moving almost like a cautious climber backing down a ladder. Squirrels and many other mammals, by contrast, tend to go headfirst. That ...