I think I could handle @MindfulMan 's dinos but this would terrify me to no end,
Scientists recreate the head of this ancient 9-foot-long bug
Scientists now know what the head of the biggest bug to ever crawl the Earth looks like. Most fossils of the extinct creatures, which grew to nearly 9 feet long and more than 100 pounds, have no heads.apnews.com
WOW .... that's crazy. They weighed more than 100 pounds !