“Unwashed, greasy hair made it much harder for ice to stick. In contrast, when the polar bear hair was washed and the grease ...

New research finds that grease that coats polar bear fur contains a specialized mixture of chemicals that make it resistant ...

author of "Ask a Science Teacher: 250 Answers to Questions You've Always Had About How Everyday Stuff Really Works. "It only has to pass from air through the grease. Light does not have to pass ...