mysterious explosion

The terrible Tunguska explosion flattened about 80 million trees on an area of ​​2,150 square kilometers, but no one knows where it originated.

On April 28, 1995, a gas explosion occurred deep under a crowded street in Taegu, South Korea, killing more than 100 people and injuring 181.

In 1908, in the Tunguese Xibiri area, there was a strange big explosion. Its power is equivalent to the explosion of 500 atomic bombs, or hydrogen bombs, that explode at once.