Micro Space Creatures eating the metal and plastics of the International Space Station

Now 76 different forms of life have been discovered and identified in the outside and inside of the ISS.

How could this life reach those places?

Anatoli Grigoriev, president of the Russian Science Academy has said that microorganisms are now attacking the station and eating the metal and plastics.

Moreover, Anatolo Grigoriev assumes that these bacteria grow without any kind of control.

These microorganisms are mutant bacteria and they are now adapted to different condition than where they came from and some microorganisms are capable or surviving for years in outer space despite the radiation and lacking water and oxygen.

Is this the evidence of life beyond Earth?