A mystery has been building in the Caribbean. Decades ago, fossilized teeth were discovered in Cuba dating to about 18 million years ago. They were small but tapered, sharp and serrated. They were the ...

Buried in Australia's so-called dead heart, a trove of exceptional fossils, including those of trapdoor spiders, giant cicadas, tiny fish and a feather from an ancient bird, reveal a unique snapshot ...

Hiding in plain sight in Japan, researchers identified a new, “extremely rare” butterfly species with a remarkable wingspan of 3.5 inches—the first in its subfamily. Initially discovered in 1988, the ...