The Big Bang, Cosmology part 1: Crash Course Astronomy #42
Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the universe began - with a bang.
Similar Shows
Poster Image

Outback
Science and Nature
Poster Image

Neanderthal
Science and Nature
Poster Image

NOVA
Science and Nature
Poster Image

Turning the Tide
Science and Nature
Poster Image

Evolution Earth
Science and Nature
Poster Image

The Gene Doctors
Science and Nature
Poster Image

Kingdoms of the Sky
Science and Nature
Poster Image

Ghost Forests
Science and Nature
Poster Image

The Burren: Heart of Stone
Science and Nature
Poster Image

Crazy
Science and Nature
WETA Passport
Stream tens of thousands of hours of your PBS and local favorites with WETA Passport whenever and wherever you want. Catch up on a single episode or binge-watch full seasons before they air on TV.