A liquid armour has been shown to stop bullets in tests carried out by UK scientists at BAE systems in Bristol.
The researchers have combined this "shear-thickening" liquid with Kevlar to create a new bullet-proof material.
The company is keeping the chemical formula of the liquid a secret, but it works by absorbing the force of the bullet strike and responding to it by becoming much thicker and more sticky.
(This whole thing rather reminds me of
walking on cornstarch...)