Happy was not just another zoo elephant. For scientists, she became one of the most important elephants ever studied. For animal advocates, she became a symbol in a growing debate about the treatment ...

An Asian elephant named Happy touched a visible mark on her own head after seeing it in a mirror, passing a test that fewer than a handful of species have ever cleared. The experiment took place in ...

Happy, the elephant that gave researchers new information on how they behave, has been euthanized at the age of 55. The Bronx Zoo said Wednesday the Asian elephant was put to sleep Tuesday after she ...