Planet Earth 3 hit UK screens on Sunday, October 22. It was be shown on TV on BBC One, and is available to stream online via the BBC iPlayer. There's a two-week delay to watch in the US.

"Planet Earth III" is airing the first episode of its first season on Saturday, Nov. 4 at 8 p.m. . There are several ways to watch with a free live stream.

Inside Planet Earth October 11th, 2009 1 hr 25 min The magnetic field created by the moving liquid metal inside the Earth's core not only traps oxygen in our atmosphere, but protects us from the ...