In July 2001, a mysterious red rain started falling over a large area of southern India. Dr Louis discover that there were tiny biological cells present, but because they did not appear to contain DNA, the essential component of all life on Earth, he reasoned they must be alien lifeforms. All the experiments are supporting this claim and the world's scientist are taking this seriously.
Here is the BBC News link; http://news.bbc.co.uk/2/hi/science/nature/6146292.stm