Echidnas are shy creatures, and even individuals without albinism are rarely seen in the wild.
Scientists uncovered a "biomarker" for chronic pain in the brains of four patients and are using the data to develop a new brain stimulation therapy.
Scientists have revealed how butterflies evolved and took over the world in a new tree of life.
From a dummy-driven Tesla, to a giant disco ball, to U.S. presidents' hair, here are some of the weirdest things humans have put into space.