Scientists think life could exist on Venus - but came from Earth

Key Points:

• Scientists propose that life on Venus may have originated from Earth through the transfer of terrestrial microbes via asteroids and meteorites, supporting the theory of Panspermia.
• Using the Venus Life Equation (VLE), researchers from Johns Hopkins University and Sandia National Laboratories estimate that microbial life could survive in Venus’s cloud layers for short periods, with hundreds of billions of cells potentially transferred over time.
• The study highlights that some layers of Venus’s atmosphere have moderate temperatures and pressures that might support microbial survival, especially as fireball meteorites fragment and remain suspended in the clouds.
• The model estimates about 100 microbial cells are deposited into Venus’s clouds annually, with around 20 billion cells transferred from Earth over the past billion years, suggesting any life found on Venus could be related to Earth microbes.
• This research implies that future astrobiology missions discovering life on Venus might encounter Earth-origin microbes rather than entirely new extraterrestrial life forms.