Last year Yitang Zhang, a little-known mathematics lecturer, solved a major unsolved prime number problem, called the "bounded gaps" conjecture. He's now been given a genius grant by the MacArthur Foundation for his work. There's a good article about it here, and you don't have to be a math geek to understand it. I'm glad that he's been recognized and rewarded for an amazing advancement in prime number theory. He proved that no matter how far you go in enumerating the prime numbers, you will never run out of pairs of prime numbers that differ by some predetermined constant N. He didn't identify the number N, but showed that such a number exists and that it is less than 70 000 000. His results tell us that the gaps between prime numbers don't become consistently more sparse and that instead there will always be "small" gaps between prime numbers. What I find thrilling is that a theorem about prime numbers that was generally believed to be true, but that could not be proven for hundreds of years, was finally proved. Other unproven prime number theorems, such as the Twin Primes Conjecture, might yet be proved too. I was surprised to learn from these articles that Zhang's talent wasn't recognized, even after he got his Ph.D., and he had trouble finding work. At one point he ended up working in a Subway fast-food restaurant! How many math geniuses have made you a submarine sandwich?