The nation celebrates the birthday of Martin Luther King Jr. on Monday. As millions honor his legacy with a national day of service, we take a moment to reflect on his legacy with the original "I Have a Dream" speech, delivered on August 28, 1963, on the steps of the Lincoln Memorial.
The Supreme Court's 2010 Citizen's United ruling loosened campaign finance restrictions, enabling corporations to spend unlimited amounts of money on elections. As a result, super PACs — political action committees — can solicit large corporate contributions and produce a plethora of attack ad campaigns.
Next up: A bit of good news for those of you lamenting the loss of your newspaper science section. The Huffington Post has a new section dedicated to science, also find a lot of technology there. Editors of the news site describe it as one-stop shopping for the latest in scientific news and opinion, with an aim to entertain as well as inform.
Welcome to SCIENCE FRIDAY. I am Ira Flatow. A few weeks ago, we talked about the discovery of new exoplanets, those planets outside of our solar system. There were the first Earth-sized exoplanets, and we had another exoplanet smack dab in the middle of the Goldilocks Zone, you know, where liquid water could exist. That was another first.
Speaking of dark matter and space-time, one of the major questions about our universe is how did it all come into being, and my next guest tackles that question in his new book, "A Universe from Nothing: Why There is Something Rather than Nothing." Lawrence Krauss is also a foundation professor and director of the Origins Project at Arizona State University in Tempe. He's also in our NPR Washington studios. Welcome back, Lawrence.
LAWRENCE KRAUSS: It's always good to be back, Ira.