how can we proof Alien Life in space?

Mathematically, it is actually quite simple, says S. Hawking. In the universe there are 100 trillion galaxies, each with 100 million stars, each with several planets. It can not be , that is with such a large number of possibilities to develop only on the earthly life. After his mathematical understanding alone, the number can be thought of aliens seem utterly real. The challenge lies is to explore the true nature of the aliens.

He introduces himself bipedal herbivores, which are hunted by flying lizards. Most living things are but microbes and simple animals that have inhabited the earth millions of years and our direct ancestors. Even in our solar system is feasible under the thick ice on Jupiter's moon Europa life. Melted water could provide the basis for the development of simple life forms have been.