Secret to Decode C.I.A. Kryptos Sculpture Sold at Auction for $770,000

'I have you now!': Darth Vader's lightsaber from 'Star Wars' sells for $3.6 million at auction

World’s biggest Mars rock sells for $5.3 million at auction

The largest Mars rock on Earth is up for auction in NYC — it could be yours for $4 million (or more)