In 1954, the world's first successful organ transplant took place at Brigham and Women's Hospital, in the form of a kidney donated from one twin to the other. At the time, a group of doctors and ...

Predicted by Einstein and dismissed as undetectable, gravitational waves were finally heard in 2016. Now, with observatories ...

The US Constitution says any natural-born citizen over 35 who has lived in the country for at least 14 years can run for ...

The Big Bang may mark an end—not the start—of a previous universe's aeon. Penrose's theory sees the universe as an eternal ...