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 ...

This illustration shows the different life stages of Turritopsis jellyfish. Image via Wikimedia Commons The hydrozoan Turritopsis dohrnii, an animal about 4.5 millimetres wide and tall (likely making ...