Venus has far fewer impact craters (created when a planet and an asteroid collide) on its surface than Mercury, Mars, and Earth's moon, leading geologists to believe that the current surface of the planet is less than one billion years old.
The atmosphere of Venus is heavier than the atmosphere of any other planet. It is made up primarily of carbon dioxide and exerts an estimated 1,323 pounds per square inch (psi) of pressure on the planet, roughly 90 times more pressure than Earth’s atmosphere.
