Weekend 1 of the Coachella Valley Music and Arts Festival in Indio packed even more of a punch than we expected, and now thousands of more people are headed to the California desert for Weekend 2.

Paleoclimate and archaeological evidence tells us that, 11,000-5,000 years ago, the Earth's slow orbital 'wobble' transformed today's Sahara desert ... of wind-blown dust preserved in deep-sea ...