In 1783, the first hot air balloon was set to fly over the heads of Louis XVI, Marie Antoinette, and the French court in Versailles. Like monkeys in space, this odd assortment of animals was chosen to test the effects of flight. Sheep, thought to be similar to people, would show the effects of altitude on a land dweller, while ducks and roosters, which could already fly (albeit at different heights), would act as controls in the experiment. The balloon flew on a tether for 8 minutes, rising 1500 feet into the air and traveling 2 miles before being brought safely to the ground. The animals were unharmed.