What is Panspermia?

There are many theories on how life evolved on Earth and one such theory in the running is called Panspermia. The hypothesis in this case is that life actually began on the planet when meteoroids brought tiny life forms such as bacteria and yeasts with them from another planet or source.

When the Solar Sytem was young the planets and moons were regularly hit by a number of meteorites. Planetary Scientists support this theory with proof of meteorites that have fallen to Earth from Mars. It is not too much of a stretch in the imagination which can lead us to believe that the basic live cells also hitched a ride on similar meteorites.

The detractors of the theory ask if it would have been possible for even the toughest form of life to survive not just inter space travel to Earth but also the impact that the meteorite would have on arrival? While the Earth’s atmosphere might have been rarer then than it is now, it would have still heated up the rocks falling from the sky.

So now we must consider, without much scientific evidence to support the theory, that life on another planet may not really be alien but actually related to us at a molecular level. More science projects would needed to prove or disprove this theory.