NASA @NASA
111 years ago, what was likely a meteor exploded over Siberia, flattening 500,000 acres of forest. The event sent shockwaves around the world, but new research indicates that asteroid impacts may be less frequent than previously thought: https://t.co/O3o4wRzwbu #AsteroidDay https://t.co/AqYzk1s8Fx — PolitiTweet.org