Thanks to the marine worm Platynereis dumerilii, an animal whose genes have evolved very slowly, scientists have shown that while haemoglobin appeared independently in several species, it actually descends from a single gene transmitted to all by their last common ...

Both adults and kids who vape were more likely to report difficulty concentrating, remembering, or making decisions than their non-vaping, non-smoking peers on two annual national surveys. Survey results also suggest that kids were more likely to experience mental fog ...

Paleontologists have succeeded in reconstructing the chewing motion of an early mammal that lived almost 150 million years ago. This showed that its teeth worked extremely precisely and surprisingly efficiently. ...