The taxicabs in Denver are a bit hornier than usual, and it's all science's fault. Carmichael Lynch put ornamental mammoth tusks on a fleet of cabs to drum up attention for the Denver Museum of Nature & Science's "Mammoths and Mastodons: Titans of the Ice Age" exhibit. The cool thing about this idea is that when the exhibit ends, they can keep the tusks and do cab jousts for charity.
