^Why its important to talk to babies: an early experiment
  putting babies into the "Pit of Despair" as its called resulted
  in their deaths. It is quite revealing.

  In the 13th Century, Salimbene wrote about experiments run by
  Emperor Frederick II, who was a curious but cruel ruler: ' Like
  Psammetichus in Herodotus, he made linguistic experiments on the
  vile bodies of hapless infants, "bidding foster-mothers and
  nurses to suckle and bathe and wash the chidren, but in no wise
  to prattle or speak with them; for he would have learnt whether
  they would speak the Hebrew language (which had been the first),
  or Greek, or Latin, or Arabic, or perchance the tongue of their
  parents of whom they had been born. But he laboured in vain, for
  the children could not live without clappings of the hands, and
  gestures, and gladness of countenance, and blandishments. " '

  This is important for us too. Facebook, and online talking and
  listening is just as valid as talking and listening to people
  "in real life". Now banned experiments like the one above that
  unfortunately get carried out on purpose or accidentally even
  today, show that while the body is important, communication is
  the difference between life and death.

  ^