Aerospace Boeing has invented the lightest metal ever, called microlattice. The product is 99.99 per cent air and will be used as a primary component in aerospace engineering - it'll be used to make space rockets.

By utilizing microlattice, Boeing could find ways to cut down on the weight of its jets and save substantially on fuel costs. It's an important invention, because although it is lighter than foam, as it is made of metal it is very strong.

As reported in the The Telegraph on Wednesday, 14th of October 2015.