Episode Archive for September 2017

Lee Billings on the Search for Life in a Silent Universe

September 27, 2017

It’s a big cosmos out there. It wasn’t too long ago that we couldn’t be sure that any planets existed anywhere outside of our own solar system. But in just the past handful of years, we’ve learned that planets orbiting stars are the rule, not the exception, which suggests that there may be 200 billion planets just in our galaxy alone, and trillions upon trillions of planets throughout the known universe. Surely, many of the planets in the Milky Way must be home to life forms, and even technologically advanced civilizations.

So where the heck are they?…