National Geographic Explorer Paul Salopek began his continent-spanning walk in Ethiopia in January 2013. Since then, his Out of Eden Walk, tracing humankind's journey out of Africa, has crossed 21 ...

The shock discovery that metallic nodules could be producing oxygen in the deep sea made headlines last year – now the team ...

Jessica Simpson looked as though she was channeling her days as Daisy Duke from The Dukes of Hazzard in a recent video she shared amid her split from estranged husband Eric Johnson. Jessica, 44, ...