RJF Alumni Ozgur Sahin's work on Bacillus spores in Nature Nanotechnology is also in the news. Water evaporation is the largest power source in nature, Sahin said. "Sunlight hits the ocean, heats it up, and energy has to leave the ocean through evaporation," he explained. "If you think about all the ice on top of Mt. Everest — who took this huge amount of material up there? There's energy in evaporation, but it's so subtle we don't see it."