Dark asteroids near Earth, hard to spot but potential threats. WISE infrared telescope helps detect them. What's the risk of asteroid impact?
An article was recently published by Scientific American, a very reputable science magazine, stating that evidence was found that life existed on Mars and was brought to Earth on a meteorite. The meteorite in question is called "Allan Hills 84001". It was blasted from Mars by a huge meteorite impact 16 million years ago and crashed on Earth 13,000 years ago.
This sounds like something from a science fiction movie, but it is a real threat to the whole planet. It can happen any time. A medium sized asteroid of a few kilometers in diameter crashing into the Earth can completely destroy our civilization and exterminate the whole human race, just like it happened to the dinosaurs.