In the June 24 SN: Unlikely worlds around dim red stars, bacteria to the rescue, flamingos’ balancing act, Jupiter up close, hominid origins revisited, spacetime shakes again, ladybug wing origami and more.
Footprints left in volcanic ash that
fell in central Mexico’s ValsequilloBasin
about 40,000 years ago are evidence that humans have inhabited the Americas
far longer than previously confirmed, a new study suggests.