Elon Musk, the founder of SpaceX, announced that five spacecraft will be sent to Mars within two years.
"Human-crewed flights will become possible after 4 years if they land successfully. Traveling from Earth to Mars is only possible once every 2 years when the planets are aligned. Anyone who wants to become a space traveler can go to Mars. This applies to you, your families, or friends who dream of great adventures," Musk said.
