Image via Wikimedia Commons The hydrozoan Turritopsis dohrnii, an animal about 4.5 millimetres wide and tall (likely making it smaller than the nail on your little finger), can actually reverse its ...

The ocean is home to some of the most fascinating creatures on Earth, but none are as astonishing as the Turritopsis dohrnii, commonly known as the immortal jellyfish. These tiny, alien-like ...