Ever since astronomers Konstantin Batygin and Michael Brown hypothesized in 2016 that an undiscovered planet hidden in the far reaches of the solar system was responsible for the odd orbits of the dwarf planets that lurk there, astrophysicists have searched in vain for this enigmatic ninth planet. But other theories have alsoread more

Two pieces of preserved wood have been discovered at an archaeological site in Zambia that indicate that ancient humans had developed woodworking techniques to build structures nearly a half-million years ago, extending our use of this near-universal building technology to a point before modern humans even emerged. Made from theread more