In the early 1970s mathematician Donald Knuth spent a sabbatical with his wife in Norway. The time was meant to be spent relaxing. Yet one night he woke up his partner in a state of agitation. He ...

The Kakeya conjecture predicts how much room you need to point a line in every direction. In one number system after another — with one important exception — mathematicians have been proving it true.

NEW YORK -- The United States is less than a year out from the Department of Homeland Security's federal requirement for Real ID for domestic flights and entering federal facilities, and to help you ...