Behind the flips, splashes and speed of Olympic water sports, science is at work. Gravity and centrifugal force are in play as a diver spins and flips before splashing into the water. Olympic swimmers shave their bodies to reduce drag as they zip through the water. Find out how science is involved in all your favourite water events and how athletes take science into account in their quest for the gold medal. Part of the Science of the Summer Olympics series.