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Genetic sequencing reveals that the starfish lost its torso during evolution, and they are heads that crawl on the seafloor. Read more here.

If you ever end up on Jeopardy! and your clue is "This star-shaped marine creature has five arms," you may want to pause before you offer what seems like the obvious...

The heads of most animals are easily identifiable, but scientists haven’t been able to say the same for sea stars — until now.

Advances in genetics are allowing researchers to probe the complexity of life on Earth

(CNN) — The heads of most animals are easily identifiable, but scientists haven’t been able to say the same for sea stars until now.

The heads of most animals are easily identifiable, but scientists haven’t been able to say the same for sea stars — until now.

The heads of most animals are easily identifiable, but scientists haven’t been able to say the same for sea stars — until now.

For centuries, naturalists have puzzled over what might constitute the head of a sea star, commonly called a “starfish.” Researchers have published a study finding that the truth is closer to the absolute reverse.

The newly sequenced genomes of two marine worms shed light on the 570 million-year evolution of gills into the human ability to bite, chew, swallow and speak.