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A new era of testing nukes?

Editor in chief Nancy Shute traces the history of nuclear weapons, from the first sustained nuclear reaction in 1942 to the renewed interest in explosive tests today.

You might be reading your dog’s moods wrong

Many dog owners can tell how their precious pooch is feeling, watching it wag its tail or raise its ears — at least, they think they can. But people’s perception of canine emotions may be strongly influenced by environmental…

Math puzzle: The Lesser Fool

In honor of April Fools’ Day, I offer the puzzling case of the Lesser Fool. In a fictional town, there lived an odd wanderer. People would present him with two amounts of money or goods and ask which is greater. Even though…