New research shows that the earliest sponges were soft bodied and lacked skeletons, explaining why their oldest fossils are ...

For decades, scientists have puzzled over a significant gap in the fossil record of Earth's earliest animals, with genetic evidence suggesting their rise more than 650 million years ago but no ...

Sponges may be ancient, but their timeline has been murky. New research suggests the earliest sponges were soft and ...

From waterfalls that seem to disappear into nowhere to blood-colored water, these places are shrouded in mystery—even if science can explain most of them.