20091218 158 PS.jpg
Nitrogen freezers at Lawrence Berkeley Labratories keep cells under -130 degrees celsius for long term storage. P.H.D. student Aaron Boudreau lifts a cell storage bank out of the freezer.


20091218 158 PS.jpg
Nitrogen freezers at Lawrence Berkeley Labratories keep cells under -130 degrees celsius for long term storage. P.H.D. student Aaron Boudreau lifts a cell storage bank out of the freezer.