After 15 years of relentless searching and more than 1,000 expeditions, NOAA researchers have achieved an unprecedented feat: spotting a living nautilus in its natural habitat. This discovery is ...

What do the ginkgo (a tree), the nautilus (a mollusk) and the coelacanth (a fish) all have in common? They don't look alike, and they aren't biologically related, but part of their evolutionary ...