Ever wish you could just hit "restart" on life? Meet the pinky-nail-sized jellyfish that actually can.

In this episode of BrainBlast, hosts Alex and Jordan dive into the mind-bending biology of the "immortal jellyfish," Turritopsis dohrnii. While it might be small enough to fit on your fingernail, this tiny creature has mastered a biological hack that scientists are still trying to fully understand.

The Biological Reset Button

The secret to its immortality lies in a process called transdifferentiation. When the jellyfish (the adult "medusa" stage) becomes stressed, sick, or simply old, it doesn't die. Instead, it undergoes a total cellular makeover:

• Absorption: The adult jellyfish absorbs its own tentacles and shrinks into a blob-like state. ...