• They R Us?

    It sounds crazy, but it is looking more and more likely that astroid strikes can splash ejecta – and perhaps microbial hitchhikers – from planet to planet within our Solar System, and possibly beyond. We’ve know for years that ejecta from Mars can reach the Earth, based on chemical analyses that tell us that some meteorites could only come from Mars. That’s led some to wonder if we might actually be Martians. Now, a new modeling study – the largest yet undertaken – revels that the odds of ejecta from Earth reaching Mars or Jupiter, or even leaving the Solar System, are higher than previously thought (important disclaimer: this new study has not yet been peer-reviewed). Maybe someday we will discover that life from Earth has already colonized the Solar System.