Gravity always wins, one might think. Avalanches roar and skiers plunge inexorably downhill. But moguls鈥攐r bumps, as they鈥檙e known by skiers鈥攎ove uphill. Just ask lead researcher David Bahr, a Regis University professor and former CU geological sciences PhD student; Tad Pfeffer, a professor of civil, environment, and architectural engineering at...