The sweat pours down like rain even when you're just standing still. You chug down ice water, but it's not enough to cool you down. Ah, what you desperately need is a bowl of Pyeongyang naengmyeon ...

Math teachers have stymied students for hundreds of years by sticking goats in strangely shaped fields. Learn why one grazing goat problem has stumped mathematicians for more than a century. If you’ve ...