Our hairy insides

How hairy do you think you are? Well, you may be surprised to know what as well as hairs on the surface of our skin, the insides of our bodies are covered in microscopic hair-like structures. But why do we need such hairy insides? Engineers at the Massachusetts Institute of Technology believe that these hairs play an important role in how fluids are transported throughout our body. Stevie Bain caught up with researcher Jose Alvarado, to find out...