Bioprecipitation is a theory about rain-making bacteria. It was proposed by David Sands from Montana State University in 1982. They believe that biological ice nuclei have the ability to catalyze freezing at warmer temperatures.[1] New research shows that bacteria may be found in clouds as a way spread their spores.[2]


  1. "LSU scientist finds evidence of 'rain-making' bacteria". EurekAlert!. Retrieved 2020-09-24.
  2. "Rainmaking Bacteria Ride Clouds to "Colonize" Earth?". Retrieved 2020-09-24.{{cite web}}: CS1 maint: url-status (link)