This is concerning the various theories surrounding the Tungus region in Siberia, 1908.

I remembered reading about this awhile back on a few Universe Mystery type books/boards/papers ... apparently there are multiple theories about what happened in Siberia that destroyed a radius of 20 miles and was experienced 400 miles away. The most common is a meteorite. The problem with this theory was that they couldn’t find an actual impact crater.

Of course then we have the other theories that vary between crashed U.F.O to an advanced culture setting off a mid-air nuclear explosion. The evidence to show the mid-air explosion theory was the way the tops of the trees and land exposed to the sky were seared and the how the magnetism of the earth, at the time, showed a fluctuation that almost parallels the effect of a atomic-bomb.

They also proposed that the area may have been struck by a comet.
The comet theory also included that from the heat of atmosphere entry caused the dirty snowball head of the comet to explode. They say that from this explosion the dust and gases tossed into the air would account for the pale haze that hung over Europe for a few days.

One of the "odder" theories, was proposed in 1965, was that it might have been ""rock"" of anti-matter that was annihilated on contact with atoms of ordinary matter, producing a fire ball of gamma rays and the explosion. They this would explain the "flash burns," the lack of a mushroom cloud, and the lack of any residual material. Willard Libby favored this theory. He stated that only a small amount of anti-matter would be needed to produce a blast the same size (think it was like 20-25 millions tons of TNT). He also added that the disintegration of the rock would explain the brief increase of C14 in the atmosphere.

**Note: there was an increase of trees in L.A. and Vegas that showed an increase of C14 in 1909, but it was no where near the expected level of C14 that would be caused by an anti-matter object**

Both this theory and the others used the actually "fireball" that was witnessed by people as evidence to back up their theories.

Here, the next one, it’s my favorite, though it is the hardest to actually grasp as fact.

It has been suggested (sometime in the early 70's, that what might have caused the destruction in Tungus, might be a "mini black hole" passed through the earth and emerged in Siberia.

Now I’m not to up on blackhole science, I was just curious if this theory of a mini blackhole (star, matter etc) is feasible. Could earth /planet, be struck by a rogue mini blackhole? I do know Hawking researched the ideas of mini blackholes being created at the time of the Big Bang, from compression and areas of expansion.

Now there was an edition of "Nature" that was published with the scientists that originally proposed the blackhole theory but I can't remember the names for sure (...think one was something Jackson), that claimed a blackhole would account for the reports effects in Siberia. But wouldn't there need to be a place with the same type of destruction on the opposite of transition through the planet?

I will have to find more info on this subject. Would be interesting to hear from anyone else if they have run into this. Just thought they were interesting ideas, and read something about blackholes today on the boards that made me think about this.

**edited for spelling, one of these days I will get a handle on the English Language**