A team from University College London (UCL) have made strands about 200 times thinner than a human hair. In fact, they're so slim they can't even be seen under a microscope! But instead of using ...

From DNA to a single hair strand, let's take a look at the smallest things our eyes can see. 1. House Fly- 8 mm These insects are grey black with slightly hairy bodies, they're visible to the ...