Gravitational waves spotted by LIGO reveal two black holes, 140 and 100 times the mass of the sun, merged to become a 225 solar mass behemoth.

Shark cage diving in Gansbaai, South Africa, is safe and offers close encounters with great white sharks. Other adventure ...

You’ll also need to bring your passports and every person aboard must also have a U.S. Coast Guard-approved life vest readily ...