Enter: Aeroseal, a Bill Gates-backed startup that sprays a mist of its proprietary sealant — made with a material similar to chewing gum — into a home's air ducts to seal gaps and other cracks.

Can receding gums grow back? Your gum tissue doesn’t regenerate the way other types of tissue does (like the epithelial tissue of your skin, for example). As a result, receding gums don’t grow ...

Gum is the second most common type of street litter after cigarette materials. In the UK, councils spend around £50m each year cleaning up the mess. But Anna had an idea. What if the sticky stuff ...