Although the speed at which today's technology is developing may scare some people, it has a huge potential to create life-saving machines. This is one of them. The 'robo-thread' is a small, snake-like robot that can glide through the brain's blood vessels and deliver clot-reducing drugs to treat strokes or aneurysms. Although the idea of a robot snake crawling through your brain isn't the most pleasant of thoughts, this little robot is promising to save lives and replace open brain surgery.