Previously, the immortal jellyfish (Turritopsis dohrnii) was the only species thought to have the ability for reverse development, but now, scientists know that the comb jelly (Mnemiopsis leidyi ...

Comb jellies, soft-bodied marine creatures that swim by beating rows of cilia, may once have had a hard skeleton. Jef Akst was managing editor of The Scientist, where she started as an intern in 2009 ...

The fossil, an eight-armed swirl named Eoandromeda after the galaxy Andromeda, is believed by researchers to be the ancestor of modern comb jellies, which populate oceans worldwide and swim using rows ...

Almost by chance, researchers in Norway found adult comb jellies reverse their development and become larva again when stressed by starvation. It helps them survive because larva eat less than the ...

Where did their adult jellyfish go, and how did an infant jelly come to be? This is the unfathomable story of comb jellyfish and how they can age in reverse. This is what their regenerative ...