Molecular spiders

Nanograss is some tasty stuff. This one time I was eating nanograss and wearing an onion on my belt. It was the fashion at the time. Well turns out that these Molecular spiders love nanograss as much as me! Supposedly by grabbing onto the grass and eating their way across it they can make it completely sterile. If you don't care about the science, just think about the possibilities. These type of tiny robots will one day be able to cure disease or stop a bull elephant in its tracks plus they're soft and cuddly and make an excellent after meal snack. The only problem will be when they get too smart and start taking over the world, but I reckon we've got 20-30 years yet.