A newly described species from the Burgess Shale had three eyes, clawed limbs, and a tail full of gills—plus internal organs ...

The researchers also reintroduced microbes to the mice after antibiotics through fecal microbial transplants. The rationale ...

It turns out that preservation of these structures is widespread, confirming the ancient origin of this type of circulatory ...

But Mosura was different. Instead of the familiar streamlined body with flaps and claws, this little predator had something ...