View full lesson: http://ed.ted.com/lessons/the-death-of-the-universe-renee-hlozek
The shape, contents and future of the universe are all intricately related. We know that it's mostly flat; we know that it's made up of baryonic matter (like stars and planets), but mostly dark matter and dark energy; and we know that it's expanding constantly, so that all stars will eventually burn out into a cold nothingness. Renée Hlozek expands on the beauty of this dark ending.
Lesson by Renée Hlozek, animation by Giant Animation Studios.