2. The theory of the extraterrestrial origin of life is not a
well-defined single theory. It is more of an extension of
the belief that since random unguided biological
evolution on earth is a fact, certainly the same forces
would have resulted in life in other places in the
universe. Extraterrestrial life is never associated with
the possibility that life perhaps could have been
created elsewhere if it could be created on earth. If it
could be verified that life existed elsewhere in the
universe, it would be presented as proof of biological
evolution.
3. The panspermia theory
-Panspermia is the proposal that life forms that can survive the
effects of space, such as extremophiles, become trapped in
debris that is ejected into space after collisions between
planets that harbor life and small Solar System bodies.
-This theory was actually first mentioned by Greek Philosopher
Anaxagoras around 500 BC.
4. The panspermia theory
• Panspermia Theory suggests that
life seeds came from outer space
and planets exchanged life.
Panspermia literally means seeds
everywhere.
• It also suggests that life could
have existed on another planet
and moved to Earth. Statistics
have showed 7.5% of rocks from
Mars reach Earth. The rocks would
travel between less than 100 years
to 16,000 years and more to get to
earth.
5. • There is intringuing evidence that some hardy
bacteria can survive the harsh conditions of
space, and even a violent impact on a
planetary surface, but panspermia remains
very especulative, although there are hints
that bugs could exist in space, the’s no direct
evidente that they actually do.
