Because it’s Carl Sagan’s birthday!
Check out carlsagan.com, read up on the SETI Institute, or just watch Cosmos again. Here’s a clip from the opening:
The cosmos is full beyond measure of elegant truths, of exquisite interrelationships, of the awesome machinery of nature.
I know you wouldn’t approve of this, Carl, but I hope that somewhere, you’ve found out everything you still wanted to know.