An ancient, armored worm may be the key to unraveling the evolutionary history of a diverse collection of marine invertebrates. Discovered in China, a roughly 520-million-year-old fossil of the newly ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." “It may be doubted,” Darwin wrote, “if there are any other animals which have played such an important ...

Ancient fossils have shed new light on a type of sea worm linking it to the time of an evolutionary explosion that gave rise to modern animal life. Researchers at Durham University, UK, and Northwest ...

500 million years ago, the world was a very different place. Basically all life lived in the water, which held a lot of animals that looked pretty different from the ones we recognize today. One of ...

A representation of single-cell RNA sequencing data from two species of worms, C. elegans (left) and C. briggsae (right). Each point represents a single cell, arranged such that cells from the same ...

Ashleigh Papp: This is Scientific American’s 60-Second Science, I'm Ashleigh Papp. You might say that Guillermo Ponz is a scientific monster hunter–even though he thinks that term, “monster” never ...