How old to enter tour de France?

Which appendicular bones have a styloid process? Did Queen Victoria have a tortoise? What did they find on Mars? What is the main idea of tornadoes? How can you carry a microscope? What is the critical temperature of diesel fuel? Where in the human body is o2 and co2 exchanged? Why rubber is the best material to make balloon? How does gonorrhea attack the reproductive system? What element would form a ionic bond with fluorine? What is the most active chemical element known as halogen? What type of simple machine is a chair? How come birds on electric wires dont get electroucuted? What external force has affected more of the earth and surface than any other? Why do moths go to the light? Is dextrose soluble in hexane? What temperature does iron melt at? Why might lion cubs not need to be born knowing how to hunt? What is present on the earth but not on the moon? Boron monophosphide chemical formula?

How old to enter tour de France?