In the twilight sky, low on the horizon, glows a brilliant body. Occasionally mistaken for a UFO, the planet is actually our nearest neighbor and Earth’s twin: Venus. Earth and Venus share a similar mass, volume and distance from the sun. Scientists even think the two planets were birthed from the same parent material some 4.5 billion years ago. But while Earth was developing into a thriving planet filled with life, Venus went down a wayward path, becoming Earth’s “evil” twin: a hellishly hot world enveloped by a thick, toxic atmosphere. “It’s like having two chocolate cake mixes and one comes out a lemon cake,” says Ellen Stofan, a Venus researcher at Proxemy Research, Inc. in Laytonsville, Md.
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