Nanometers in one meter: 1,000,000,000
Diameter, in nanometers, of a cold virus: 50
Diameter, in nanometers, of a mammalian cell: 25,000
Nanotubes needed to equal the thickness of one human hair: 10,000
Approximate growth per second, in nanometers, of a human fingernail: 1.5
Sources: Whatis.com; MIT Technology Review; IBM; Hooked-on-Nails.com
