Science in 140 characters: From bullet to dust

@davidbridDavid Brin, AstrophysicistOne of the biggest problems with traditional armour has been that it is extremely heavy, even for occasional use in cars. It can’t be used on vehicles that don’t have significantly powerful engines as the added weight of steel makes the vehicle too heavy to be driven at regular speeds. David Brin tweeted about Composite Metal Foams (CMFs) that North Carolina State University professor Afsaneh Rabiei has spent the last few years developing. It&rsquo