When Homo sapiens appeared some 300,000 years ago, at least six other human species already shared the planet. Here, in the studio of paleoartist John Gurche, are model representations of those ...

On January 14, hippies and other counterculture participants swarmed to the polo grounds in San Francisco’s Golden Gate Park in a gathering called the Human Be-In. Timothy Leary advised ...

"These multi-planet viewing opportunities aren't super rare, but they don't happen every year so it's worth checking out." Looking for a telescope for the next night sky event? We recommend the ...