How do you find out if there’s a secret room hidden in an ancient pyramid? Not in the same way you’d discover hidden spaces in a home you’re remodeling—that is, by busting through walls. You’ve got to ...

What's the best way to get a statistically reliable sample of people who are hard to identify, such as illegal-drug users in large cities, itinerant jazz musicians, aging Manhattan artists and ...

The internal structure of an ancient Egyptian pyramid was revealed for the first time using cosmic particles, a team of international researchers reports. The innovative technology was applied to the ...