A Wikimedia Commons hi ha contingut multimèdia relatiu a: 1665  
  1. Extracte de la descripció de Hooke (Universitat de Berkeley)
    « […] I could exceedingly plainly perceive it to be all perforated and porous, much like a Honey-comb, but that the pores of it were not regular [..] these pores, or cells, [..] were indeed the first microscopical pores I ever saw, and perhaps, that were ever seen, for I had not met with any Writer or Person, that had made any mention of them before this. […] »
    — Hooke