On Aug. 27, Mars will be closer to Earth than in nearly 60,000 years. This “close approach,” as it’s being billed, has some folks worried about potential dangers here on our planet. One SPACE.com reader asks: “Will it be dangerous when Mars gets that close to Earth? It has me a little worried.” Others have e-mailed to say they heard there would be earthquakes or other disasters. One of the many rumors going around says the two planets will collide. The true gravity of the situation is benign. There is absolutely nothing to worry about.