The coral's stinging armoury isn't used only for collecting food; they also use it to fight. As has been discovered only comparatively recently, cora… - David Attenborough

Human beings are good at many things, but thinking about our species as a whole is not one of our strong points. m4s45-m4s53

All over the world, birds [...] manage to survive in the most hostile of places. A century ago, a completely new kind of environment appeared on Earth. Nothing like it had faced birds before in their entire 200 million year history. Yet some species began to adapt to it almost immediately... The modern city.

Its heart that in flight contracted a thousand times a minute, slows until its beat is virtually undetectable. Its body temperature falls dramatically, and its breathing seems to cease altogether. [...] It's hibernating; but for a hummingbird, winter comes 365 times a year.