The idea that life on Earth came from another planet has been around as a modern scientific theory since the 1960s when it was proposed by Fred Hoyle and Chandra Wickramasinghe. At the time they were ridiculed for their idea – known as 'Panspermia'. But now, with growing evidence, it's back in vogue and even being studied by NASA.

We meet the scientists on a mission to get to the bottom of the beginnings of life on Earth - from the team in Texas who are lovingly building a robotic submarine called DEPTHX to explore a moon of Jupiter, to Southern India where they are investigating a mysterious red rain which fell for two months in 2001. According to local scientist Godfrey Louis, the rain contains biological cells unlike any he had seen before – with no DNA and the ability to replicate at 300°C. Louis has come to the conclusion that the cells are extraterrestrial in origin.

Could all this really be proof that 'We Are The Aliens' ?

Panspermia : Its own origins and evolution ...

The idea that the seeds of life are ubiquitous throughout the cosmos goes back to Anaxagoras, a Greek philosopher. In the 1800s, French chemist Louis Pasteur proposed that spontaneous generation of life could not have occurred on Earth. British physicist Lord Kelvin and others jumped on Pasteur's bandwagon and suggested that life might have come from space.

But modern-day panspermia advocates have been the Rodney Dangerfields of science.

In fact, just two leading researchers carry the bulk of the panspermia torch. The renowned Sir Fred Hoyle, known for his studies of star structure and the origin of the chemical elements in stars, has worked with Chandra Wickramasinghe over the past three decades to pioneer the modern theory of panspermia.

In the 1970s, Wickramasinghe and Hoyle found what they say are traces of life in the dust around distant stars. The duo then broadened the panspermia theory, arguing that a continual rain of life altering stuff from space, including germs that arrive in cycles related to solar activity has affected the course of evolution. The seeds, they say, are still coming.


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