Life from Mars theory

There has been a theory if life from Mars could have arrived on Earth. A rock attached to an unmanned Russian craft was sent to space to find if meterorites could carry primitive life from one planet to another. The slab of rock was sent to Sandwick was sent to Vienna to be sculpted into the right shape. It was the size of a bowler hat and attached to the side of the European Space Agency's Foton M3 mission launched last month. The effect of the heat upon re-entry of the rock was looked into by Professor John Parnell. He concluded that primitive life would not be able to surivive a meteroite of small size because of the heat. It may be able to surve inside the center of a much larger one. But any bigger than one measuring tens of centimeters would vaporize when it hit the ground.