A rock is expected to fetch up to $4 million in an auction — it's the biggest chunk of Mars on Earth

Sotheby’s upcoming Natural History Auction features the 25-kg Martian meteorite NWA 16788, representing 6.5% of all known Martian material on Earth, expected to sell for $2-$4 million. Other notable items include a lunar sphere, the Allende meteorite, and various terrestrial artifacts, with the auction taking place in New York City on July 16.

Explain It To Me Like I’m 5: Sotheby’s upcoming Natural History Auction features a remarkable 25-kg Martian meteorite, NWA 16788, that accounts for approximately 6.5% of all known Martian material on Earth, alongside other unique space rocks and ancient artifacts.

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