Another thesis by Richard Cathcart: Did the aliens already die out?

The universe is a very dangerous place. Asteroid to hit a planet, gamma-ray bursts produce lethal rays showers, colliding stars or burn up. There are countless opportunities to go out and burgeoning life. Astrophysicist Milan Cirkovic and geographer Richard Cathcart will assume that the first billion years the universe was much hostile even than the present: "The earliest civilizations must have originated in an era in which radioactive, in supernovae generated elements have been more. "

The energy from the radioactive decay of material in the interior of planets is the main heat source, the tectonic movements of the crust caused - some mechanism that is still effective in the earth. Earth-like planets in the early universe were thus geologically more active, which might have hampered the emergence of stable living conditions.