The headline of the article in the OP reads "Russian Scientist: UFO collided with Tunguska Meteorite to save Earth"

So first he has to prove that aliens exist, then he has to prove that they have spacecraft that can make the interstellar flight to our solar system, then he has to prove that they care enough our planet to intercede on our behalf, then he has to prove it was a meteorite, not a comet.

I'm going to go ahead and side with Occam on this one and say "It was a comet that exploded in the air"

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I was just sitting here contemplating the immortal words of Socrates who said, "I drank what?"

"Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot." --Carl Sagan "Pale Blue Dot"