The remains of a missing person from Argentina were recently found inside the belly of a dead school shark. But experts say it is improbable that the shark killed him.
Researchers have recorded an orca swimming with a pilot whale calf in a possible interspecies adoption, but how the two came together is a mystery.
A strange blob has been seen rapidly circling our galaxy's central black hole. Now, astronomers have identified it as the exploded debris from two merging stars.
Half a million men in the United States undergo a vasectomy every year. But how does this procedure work?