How This Woman Rides 20,000 Miles a Year on Her Bike

Ultra-endurance bicycle racer Lael Wilcox puts more miles on her bike every year than most people do on their cars. Here’s how she trains for and rides some of the toughest races on earth.

Are Athletes Really Getting Faster, Better, Stronger?

The debate is as old as physical competition. Are stars like Usain Bolt, Michael Phelps, and Serena Williams genetic freaks put on Earth to dominate their respective sports? Or are they simply normal people who overcame their biological limits through sheer force of will and obsessive training?