A combination of nano-sized pores and the use of a special coating called preen oil makes Antarctic penguin feathers ultra-water-repelling, which keeps them ice-free.
If you’ve ever waited on an airport runway for your plane to be de-iced, had to remove all your food so the freezer could defrost, or arrived late to work because you had to scrape the sheet of ice off your car windshield, you know ...
