Surprisingly, genome comparisons have failed to resolve a major question in animal evolution: Which living animals are the descendants of the earliest animals to evolve in the world's oceans?

To understand the origins of multicelled life, researchers are studying a motley assortment of simpler animal relatives. The commonalities they’re unearthing offer a trove of clues about our mutual ...

All animals are related to each other, but comb jellies — a marine invertebrate found in oceans around the world — are the most distantly related to all other animals, shows a new study in Nature.

A study published by MBARI researchers and their collaborators today in Nature provides new insights about one of the earliest points in animal evolution that happened more than 700 million years ago.

Add Yahoo as a preferred source to see more of our stories on Google. A sloth will be one of the live animals at the Milwaukee Public Museum's temporary exhibit, "Survival of the Slowest," from Feb.

Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly genetically identical cells. Depending on the organism, these cells arrange ...

Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly genetically identical cells. Depending on the organism, these cells arrange ...

Every other Friday on Morning Edition, the Outside/In team answers a question from a listener about the natural world. So, the first thing I learned digging into this question is that it’s important ...

We pride ourselves on being the most intelligent of animals, the ones who dominate from the sky to the depths of the sea. This claim is not false, but it omits an essential aspect: the other creatures ...