Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. For a group of small aquatic animals known as hydra, decapitation is ...

Hydra reproduce asexually, budding off little clones, so Martinez had to pick those young out and toss them. After four years of this, not only were the hydra still alive, but they looked good as new.

Eric Mack has been a CNET contributor since 2011. Eric and his family live 100% energy and water independent on his off-grid compound in the New Mexico desert. Eric uses his passion for writing about ...

Hydra are infamous for their ability to regenerate tissue after being torn apart. But one mystery about these tiny tentacled creatures that has dogged scientists was: How do Hydra open their mouths?

The hydra, a small freshwater creature, tears itself apart every time it gets hungry. Rather than have lips, the hydra’s mouth is a sealed piece of intact skin that it tears open to gobble each meal.

In ancient Greek myth, the Hydra was a multi-headed monster that grew two more heads for every one that it lost. As it turns out, the real-life animal named after this mythical beast may be even more ...