We've long pointed to East Africa as the birthplace of our species, but thrilling new fossil finds suggest our roots are further south. We'll explore some of South Africa's most significant archaeological sites that are yielding crucial insights about our lineage. An unlikely trio has joined forces to predict the next major power failure, but will it be enough to avert the blackout of the century?
And from disease to mental illness, men and women face different risks. Today, neuroscientists think these differences lie in the brain's wiring. You'll also learn how to expel a catchy tune that's stuck in your head. You can thank us later.