Freshwater habitats around the world are becoming less and less hospitable to wildlife
Most of the matter in the universe is neither bound up in stars or planets nor dispersed in clouds of "ordinary" particles. But what is it made of?
Special cells in the brain mimic the actions and intentions of others, forming the basis of empathy and social connections.
The Native-American language Salish–Pend d’Oreille is on the brink of disappearing.