Reply to comment by Maenethal in TIL that scientists created contact lenses that zoom when you blink twice through the use of electric impulses by jamjam1090

Reply to comment by starkfr in TIL Snow is an excellent insulator because it consists of about 90–95 percent trapped air (fresh). This is the reason why igloos are warmer inside than outside, and why some animals in colder regions build snow caves to spend the winter while hibernating. by SunCloud-777