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 ...

We already knew comb jellies were pretty special: Their regeneration abilities are unmatched, they can fuse together to ...

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 ...