The Tunguska Meteorite, which exploded near Russia's Tunguska River in 1908, is still the subject of debate nearly 100 years later. It didn't leave an impact crater, which has led to speculation about its true nature. But most scientists believe that around 7:00 A.M. on June 30 a giant meteor blazed through the sky and exploded in a huge ball of fire that flattened forests, blew up houses, and scorched people and animals within 13 miles. Scientists continue to explore the region, but neither a meteorite nor a crater have ever been found. Conspiracy theorists contend that what actually hit Earth that day was an alien spaceship or perhaps even a black hole.
Meteor crashes are more common than you may think ,as you'll find out on the next page.