http://www.noaa.gov/stories/what-are-atmospheric-rivers

Atmospheric rivers are relatively long, narrow regions in the atmosphere – like rivers in the sky – that transport most of the water vapor outside of the tropics. These columns of vapor move with the weather, carrying an amount of water vapor roughly equivalent to the average flow of water at the mouth of the Mississippi River. When the atmospheric rivers make landfall, they often release this water vapor in the form of rain or snow.

Article – Nature.com:
CRISPR: gene editing is just the beginning
The real power of the biological tool lies in exploring how genomes work.
by Heidi Ledford

Genetic Engineering Will Change Everything Forever – CRISPR

Genome Editing with CRISPR-Cas9