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 ...

Every morning, as the sun rises, the jellyfish begin to swim towards the ... to show how the gill arches of jawless fish altered in size and function. Evolution of sight. videoEvolution of sight ...