Big, Really Big

The universe is big –“ really big.* Galaxies, for instance, are often large enough to hold a trillion stars. But how did these heavenly heavyweights come to be? Hear how still-mysterious dark matter is implicated in the birth of galaxies.

Also, gamma ray bursts –“ explosions more energetic than anything since the Big Bang –“ take place somewhere in the visible universe every day. What are they, and could they obliterate life on Earth?

And, the biggest cosmic mystery de jour: dark energy. Why new, super-size telescopes may finally reveal just what it is.

We´re living large on "Big, Really Big."

*appreciative nod to Douglas Adams

Guests: