Early on in the pandemic, it became clear Covid-19 had made the leap from animals to humans. The exact chain of transmission isn't known, but the science so far suggests bats played a starring role.

Living in an essentially zero-gravity environment, many deep-sea animals have evolved soft, gelatinous bodies and collect food using elaborate mucus filters. Until now, studying these delicate ...

A recent study suggested that the total number of unique species that call Earth home may be as mind-bogglingly high as 1 trillion. Granted, the vast majority of those are microscopic organisms, but ...