Venus Has So Many Volcanoes

Earth and Venus can sometimes be seen as twins. The planets, second and third from our Sun, are close to the same in size (7,521 mile diameter for Venus, 7,918 mile diameter for Earth), nearly identical in density (5.24 vs. 5.5 grams per cubic centimetre) and both are constructed from layers of rock and metal consisting of a thin outer crust, thick mantle and metallic core.