Scorpionidea or Scorpiones is the scorpion order of Arachnida. They have four pairs of lung-books in the mesosoma and the post-anal telson forms a sting. Scorpions are amongst the most hardy of animals, able to survive frozen in ice for three weeks, temperatures over 40 degrees Celsius and withstand two hundred times the amount of radiation (such a... Found on http://www.probertencyclopaedia.com/browse/BS.HTM