What most of us would recognise as a jellyfish - the otherworldly, gelatinous aquatic animals renowned for their sting-filled tentacles - is actually just the final stage of these animals' life cycle.

The juvenile then starts the jellyfish’s life cycle all over again. It’s as if a frog, say, were to revert to a tadpole or a butterfly to a caterpillar. Scientists call the near-miraculous ...

This fingernail-sized, unassuming creature possesses the rare ability to revert back to its juvenile polyp stage after reaching maturity, which is an early stage in the life cycle of a jellyfish ...

Jellyfish are known for drifting to and fro at the whim of ocean currents—but not all species are so passive. The millions of golden jellyfish that pack Palau’s Jellyfish Lake spend much of ...