The mementoes — a set of more than 50 pieces called the Sally Ride Estate Collection — sold for a total of $145,666, ...

I’ve spent much of my long life studying — and trying to understand — the history of the universe. Along the way, I have been constantly reminded that science is essentially international: Science ...

When Neil Armstrong stepped onto the Moon in 1969, 600 million people watched on black-and-white televisions. Today, most of ...