Two competing theories about the human occupation of Southeast Asia have been debunked by ground-breaking analysis of ancient DNA extracted from 8,000-year-old skeletons
Einstein's understanding of gravity, as outlined in his general theory of relativity, predicts that all objects fall at the same rate, regardless of their mass or composition
As climate change continues to push summer temperatures ever higher, the increased use of air conditioning in buildings could add to the problems of a warming world