Three American scientists specializing in dark energy were awarded the Nobel Prize in physics today. Win Rosenfeld talks to Brian Greene about why dark energy has been a top priority for the astrophysics community in recent years.
How many universes are there? Author Brian Greene explains. Plus: A fracking update, a look at what’s next in Egypt and an interview author Parag Khanna.
Theoretical physicist and New York Times best-selling author Brian Greene explains, among other things, how the universe is like a muffin, and why there’s actually not one universe at all.