You are participating in a holiday gift exchange with a few classmates. You each write down your own name on a slip of paper and fold it up. Then all the students place their names into a single hat.

The Riemann Hypothesis is one of the most famous problems in that set. It’s about prime numbers. That’s any whole number that can only be divided by 1 and itself – like 2, 3, 5, 7 and 11.

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John Klingberg of the Sharks, brought in to quarterback the power play and stabilize the transition game, is struggling.

Born Free opposes the exploitation of wild animals in zoos and aquaria. Since 1984, Born Free has challenged the global zoo industry and today we lead the movement against the captive exploitation of ...