Comedians Dante Powell, James Doyle and Aaron Naylor join Mark to talk about the genetics of lactose intolerance, how a group discovered a new class of antibiotics, and why you really shouldn't connect sponges and wet batteries to your head.

Follow Dante Powell on twitter:

@DantePowell 

Follow James Doyle on twitter:

@JamesYoDoyle

Follow Aaron Naylor on twitter:

@IamAaronNaylor