Could this make sport safer? Tech founder Peter Thiel is backing the Enhanced Games, at which athletes will be allowed to take any drugs they want to.
Billionaire to launch drug-friendly Olympics
Elite cheats: The organisers claim that 44% of today's athletes already take banned drugs. Glossary
Olympic Games - A major international multi-sport event held every four years.
Persuade - Convince. Try to change someone's mind or make them do something.
Mastermind - The brains or person behind a big plan.
Athletes - Somebody who competes in sports events.
Usain Bolt - Jamaican sprinter Usain Bolt is the fastest human alive, with a top speed of 27.79 miles per hour compared to the rhino's 34. The world's fastest mammal, the cheetah, can reach around 75 miles per hour. The fastest animal, however, is the peregrine falcon, which can dive at up to 240 miles per hour.
Doping - Drugs, hormones and blood transfusions can all help to give athletes a crucial advantage. Some sports theorists say that doping is no less fair than using sophisticated technology or dietary supplements, but due to health risks and perceived dishonesty, most of these techniques are banned.
Encourage - Urge, or persuade someone to do something.