MICROBES from Earth could have journeyed to Saturn’s moon Titan and may even be thriving there. This startling suggestion comes from a massive computer simulation of what could happen to Earth rocks blasted into space by a large meteor impact.
An impact of the type that caused the mass extinction of species at the Cretaceous-Tertiary boundary could eject more than half a billion rocks from Earth into space. Our planet has had quite a few impacts of at least this magnitude in its four-billion-year history, says Brett Gladman of the University of British Columbia in Vancouver, Canada. “We know that…
