The saying may be that men are from Mars while women are from Venus but there is a growing scientific theory that we all came from Mars and arrived here courtesy of volcanic eruptions or meteorites blasted off the red planet.
The reason some folk in white coats believe we began elsewhere in the Solar System is due to an element believed to be crucial to the origin of life would only have been available on the surface of Mars.
Geochemist Professor Steven Benner from The Westheimer Institute for Science and Technology in the US, said: 'The evidence seems to be building that we are actually all Martians; that life started on Mars and came to Earth on a rock'.
Speaking at the Goldschmidt 2013 conference in Florence, Italy, he said: 'It's lucky that we ended up here nevertheless, as certainly Earth has been the better of the two planets for sustaining life. If our hypothetical Martian ancestors had remained on Mars, there might not have been a story to tell."
Prof Benner said the element molybdenum was thought to be a catalyst that helped organic molecules develop into the first living things.
'This form of molybdenum couldn't have been available on Earth at the time life first began, because three billion years ago the surface of the Earth had very little oxygen, but Mars did. It's yet another piece of evidence which makes it more likely life came to Earth on a Martian meteorite, rather than starting on this planet'.