This week Nature looks at the bears in Alaska and Nova takes you into space!
Nature: Fortress of the Bears - 7:00 p.m.
Alaska supports the largest concentration of bears anywhere in the world who feast on mass amounts of salmon. For the first time when the salmon don’t arrive, their food chain is in jeopardy.
NOVA: Earth From Space - 8:00 p.m.
This film presents the Earth as you’ve never imagined. Satellite images transformed into spectacular sequences show us how dust from the Sahara fertilizes the Amazon, an Antarctica “waterfall” that helps drive the world’s ocean currents, and more.