Scientists know little about this extinct subspecies that fall between modern humans and Neanderthals, named Denisovans, and this recent discovery could be proof they lived outside of Siberia. ...read more
Some scientists defend an age-old skeletal explanation for childbirth — dubbed the obstetrical dilemma — while others propose a metabolic alternative. ...read more
Deciding which carnivorous dinosaur was the most dangerous between the Tyrannosaurus rex, Velociraptor and Spinosaurus, is more complicated than you think. ...read more