ets from alien gaxies are the main cause of extin oh,

Dust kicked up by et impacts be pushed by the pressure of sunlight,

Flying outward at a speed of 108,000 kilometers per hour,

The existence of life oh and the evolution of advanced life is also reted to the fact that the earth has a Jupiter,

The sor system will be bombarded by such ets,

If there is no Jupiter, the ces of Earth suffering from the same meteorite that killed the dinosaurs,

The sun has a panion star called Nemesis,

Mass extins oh seem to happen every 20 to 40 million years,

Frequent exge of material with other pary systems,

Jumping from the sor system to another pary system passing by,

faster than the retive velocities of two stars at close enters,

It is precisely because of Jupiter that has the rgest mass and volume that it attracts many meteorite impacts to the earth,

Every 26 million years or so, it collides with the Oort cloud region at the edge of the sor system,

This means that microbes may be able to take advantage of this process,

It will be once every 10,000 years, then no advanced life evolve on the earth at all,

The emergence of human beings is believed to be the result of a series of fortui

If Earth were in the orbit of Venus or Mars, it would be too hot or too cold for life to exist,

This number is very close to the cycle of mass extins oh,

life to exist,