Footprints discovered at what was once a rain-fed lake in Saudi Arabia’s Nefud Desert suggest that humans on the move made a pit stop there more than 100,000 years ago. Elsewhere in Saudi Arabia, researchers have found stone tools like those made by African H. sapiens that date to around 125,000 years ago (SN: 1/27/11), raising the likelihood that the newly discovered footprints were made by humans. Preserved footprints of elephants (left) and camels (right) at a dried-up lake in Saudi Arabia date to the same time as ancient human footprints, researchers say.