The gigantic egg is 100 times larger than an average chicken's—it's a foot long and almost nine inches in diameter—and it can be yours for just $45,000. On April 24, Christie's will auction the fossilized egg, which was laid by the elephant bird, reports the AP. The ostrich-like species from Madagascar grew up to 11 feet in height, but was extinct by the 18th century, reports LiveScience. It was flightless, as was another famed and long-extinct bird: the dodo. A femur bone fragment from that creature will also hit the block.
It's expected to fetch about $22,000, and is one of hundreds such fragments that have been discovered. And that makes one zoologist nervous. "The big concern is that if it sells for a lot of money, there may be a big increase in thefts from institutional collections or attempts to rob fossil localities for profit. This would result in severe damage to the site." (Read more Madagascar stories.)