Venus, often called Earth’s “evil twin” planet, formed closer to the Sun and has since evolved quite differently from our own planet. It has a “runaway” greenhouse effect (meaning heat is completely trapped), a thick carbon-dioxide-rich atmosphere, no magnetic field and a surface hot enough to melt lead.
Several uncrewed scientific missions will study how and why that happened in the next decade. But now some scientists want to send a crewed mission there as well for a flyby. Is that a good idea?
