The start of the Triassic period (and the Mesozoic era) was a desolate time in Earth's history. Something—a bout of violent ...

A crater at the edge of the Yucatán peninsula in Mexico was created by a massive asteroid that hit Earth 66 million years ago ...

Lili Weigert reveals her top tips for maximizing your time at San Francisco's most popular attractions, such as Golden Gate ...

If you only have 24 hours in Boston, you'll want to visit the city's most famous attractions, including the Freedom Trail, ...