Ethan Siegel at Starts with a Bang writes:
One of the wildest predictions of the Big Bang, which asserts that today’s Universe arose from an early, hot, dense state, is that there should be a leftover, low-energy bath of radiation permeating the whole of space.
When you calculate what the wavelength of that radiation ought to be today, many billions of years later, it turns out to be just right to interact with an old television set’s “rabbit ear” antennae.
If you turn an old TV set to channel 03, about 1% of that static-like “snow” you see originates from the Big Bang itself, enabling you to “discover” the Big Bang with an old TV set under the right conditions.
Read the rest at Starts with a Bang