But a rare young dinosaur skeleton stole the show when it fetched more than $30 million in a bidding frenzy.

Sotheby’s auctioned a dinosaur fossil for $30.5 million on Wednesday.

"This is the largest piece of Mars on planet Earth. The odds of this getting from there to here are astronomically small," Cassandra Hatton, vice-chairman of science and natural history at Sotheby's,...