Today a huge asteroid is passing close to Earth without incident, but a smaller one streaked across the sky over Russia, creating an ongoing shock wave, causing extensive damage and injuring 980 ...
The meteor - estimated to be about 10 tons - entered the Earth's atmosphere at a hypersonic speed of at least 54,000 kph (33,000 mph) and shattered into pieces about 30-50 kilometers (18-32 miles) ...
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