The Greeks painted houses white to stop the spread of cholera. Now white paint is saving energy.

Scientists at Purdue University developed a new super-white acrylic paint that reflects 95.5 percent of sunlight and can save energy for urban dwellers. Wow!

​"A surface painted with the whitest white can be eight degrees Fahrenheit cooler. At night, the difference is even more pronounced, at up to 19 degrees." Below is a photo taken in 2012 on a hill-top overlooking Oia, Santorini, Greece.