Study suggests Earth may have sent life to Venus over billions of years
10 reported
A new study presented at the 2026 Lunar and Planetary Science Conference suggests Earth may have been sending microscopic life to Venus for billions of years. Researchers from Johns Hopkins University Applied Physics Laboratory and Sandia National Laboratories used the Venus Life Equation framework to model how asteroid impacts could launch microbes into space. Their modeling indicates that life delivered from Earth could potentially survive in Venus’ clouds for at least a few days per century. The team estimated that hundreds of billions of cells may have been delivered from Earth to Venus, with hundreds of billions potentially remaining viable. Their preferred estimate suggests about 100 cells become dispersed throughout Venus’ clouds each Earth year, totaling roughly 20 billion cells over the past 1 billion years. The researchers note that their model does not capture every aspect of how bolides interact with Venus’ atmosphere and that every parameter in the Venus Life Equation carries significant uncertainty. If a future astrobiology mission discovers life in Venus’ clouds, one possible explanation is that it originally came from Earth.
What’s reported
The study was presented at the 2026 Lunar and Planetary Science Conference.
Researchers from Johns Hopkins University Applied Physics Laboratory and Sandia National Laboratories conducted the study.
They used the Venus Life Equation (VLE), a framework developed by Noam Izenberg et al. in 2021.
The VLE estimates the likelihood of life by combining factors: origination, robustness, and continuity.
Modeling suggests life delivered from Earth could survive in Venus’ clouds for at least a few days per century.
The team used the “pancake model” to simulate how fireball meteorites behave entering Venus’ atmosphere.
Estimates indicate hundreds of billions of cells may have been delivered from Earth to Venus, with hundreds of billions potentially remaining viable.
The preferred estimate is about 100 cells dispersed throughout Venus’ clouds each Earth year.
Over the past 1 billion years, roughly 20 billion cells may have been transferred from Earth.
The researchers acknowledge significant uncertainty in every parameter of the VLE.
Key figures
Noam Izenberg (developer of the Venus Life Equation framework, 2021)
Matthew Williams (original writer for Universe Today)
Sources: ScienceDaily
