happy 100th, centenarian mathematician Richard K. Guy!
Some mathematicians die young, like Galois, Abel, or Zhitomirskiy . Others are active well into their 90s, like Bertrand Russell, Martin Gardner or Richard K. Guy, the last of which turns 100 today. I recently remembered an article a couple years back about him walking over 800 steps to the top of a tower every year, and looking it up shows that he did it this year: From the The Strong Law of Small Numbers to the glider in the game of life, Guy's discoveries (and compilation of the undiscovered, in Unsolved Problems in Number Theory ) will be leading to new mathematics in 2116. Happy birthday, Richard K. Guy!