Say hello to the insulation of the future: Aerogel. It is the lightest and least dense material on the planet, and it’s composed of silicon dioxide– the same stuff that makes glass. Don’t let its fluffy appearance fool you however, because it is surprisingly strong. Although it’s rather brittle, it can support up to 4000 times its weight in compression. It can also insulate 39 times more heat than fiberglass, which means Aerogel could potentially be used to make your home completely temperature proof. Thanks, science!