Was 1908 when Tunguska In Siberia (region at the north of Russia) there was a huge explosion every tree that fell in that area, no sign, no crater, no meteorite only the testimony of people who saw that event: the explosion just after the local people reported seeing rise from that place an enormous fireball shape elliptical . The consequences of this event were devastating : Other people died from diseases caused by radiation . Today, there are those who say that this event was due to a comet Or with a small black hole but ufologist argue that the case leaves no other possibility than to an explosion of a airplane alien A UFO is thought that the remains of this OVNI are now in the hands of the Russians in a maximum security of the hire unknown.