Mars 101 | National Geographic

Mars, the fourth planet from the sun, has been a source of intrigue throughout human history. Recent NASA exploratory expeditions revealed some of the planet’s biggest mysteries. This video explains what makes Mars so different from Earth and what would happen if humans lived there. ➡ Subscribe: ➡ Get More 101 Videos: About National Geographic’s 101 Series: Explore and experience the forces that shape the world around us. Get More National Geographic: