Apex is estimated to fetch between $4 million and $6 million when it comes to auction in July. Cassandra Hatton, Sotheby's senior vice president, and global head of science and popular culture, says it is the first time a specimen of this kind has been offered by a major international auction house. "This is an incredibly important discovery, and I don't know of another stegosaurus that matches the size and quality of this one." Hatton explains that Apex is approximately 11.5ft tall, 27ft long and 6ft wide - almost twice the size of Sophie, the stegosaurus in London's Natural History Museum. "The quality of the fossil is excellent," she adds. "Even impressions of the skin have been preserved."
Apex will be offered in the Natural History Auction on 17 July at Sotheby's New York
