What's the biggest group of animals ever recorded on Earth?

Saturn’s rings are so much brighter than Jupiter's because they're made mostly of ice particles replenished by many small moons embedded in the rings. Jupiter’s dim, thin rings, by contrast, are made mostly of dust shed from a few small moons, and the large Galilean moons destroy any large rings.

New Set of Chemical Reactions Could Finally Explain How Life Started on Earth

Spix’s Little Blue Macaws Fly Free Again After Decades In Cages