On June 30, 1908 there was a large explosion that occurred near the Stony Tunguska River in Siberia. An area of 7.7 million square miles (20 million square km) was affected by the explosion, ten million trees have destroyed and hundreds of thousands of animals have died. Changes in the Earth’s magnetic field have been detected. In 1927, no meteorological evidence was found in the first investigation conducted in the region. None of the theories like antimatter collision, black holes or Nuclear-powered spaceship haven’t been proven.
Danish researchers have explained that this explosion may have been caused by a large fragment that fell from a comet passing close to Earth. Kaare Lund Rasmussen and his team from Geoscience Research Institute reached this conclusion by examining a century-old peat samples from the region. Peat is a kind of ground coal consisting of decaying plants.
According to the researchers, the Tunguska Phenomenon occurred by explosion of an ice mass of 1-10 million tons on the forest.According to the researchers, the Tunguska Phenomenon occurred by explosion of an ice mass of 1-10 million tons on the forest. Rasmussen believes that ice cubes are broken from the comet that passing every 3.3 years near the earth. The day the event took place, the shepherds in the region said they had seen a bright object dropped from the sky just before the explosion. The explosion, 650 times powerful than the atomic bomb that dropped on Hiroshima, was heard from 750 miles (1,200 km) away.
The shock wave, caused by the explosion, overturned all the trees within 770 square miles (20,000 square km).
It was believed that the explosion on the Tunguska until today was a great meteorite.
But Rasmussen points out that the crater that should be caused by a meteor explosion can’t be detected in the region nor in the satellite images. “I think the 99.5 percent of the exploding object is a piece of ice, which consists of frozen water and methane” the Danish researcher says.
Rasmussen also notes that the falling ice piece is billions of years old. The proof is the almost complete disappearance of carbon-14, whose half-life is 5,730 years.