Though your skin and hair - and for that matter, your eyes and teeth - cannot be differentiated genetically, don't go substituting your toothpaste for hair gel anytime soon. But beyond the genetic level, what accounts for the differences in these bodily features? The answer lies in epigenetics.
In this NOVA Science Now segment, renowned astrophysicist Neil deGrasse Tyson turns his attention towards more earthly bodies and distills the nuances of epigenetics via identical twins, mice and other things that scientists spend a lot of time studying in order to better understand life-threatening diseases like cancer.
