it s the dinosaur skull that cost an arm and a leg. this specimen called maximus sold today for $6 million. it is an adult t-rex head. 76 million years old, complete with teeth. it weighs 200 pounds. that s without the skin and the flesh. and it is over 6 feet tall. for the skull. maximus was discovered on private land in south dakota. the only time a skull like this has come up for auction as a stand alone piece. the only known t-rex skull available for private ownership. early sale estimates came in up to $20 million. bidding back and forth for six minutes before the gavel came down at $6 million. who bought it? wouldn t you like to know. we have no idea. thanks for joining us. ac 360 starts now.