One of the world's largest lunar meteorites goes on private sale at Christie's on Thursday, valued at $2.49 million.
The moon rock, weighing over 13.5 kg, was probably struck off the surface of the moon by a collision with an asteroid or comet and then showered down on the Sahara desert.
Known as NWA 12691, it is thought to be the fifth largest piece of the moon ever found on earth.
There is just 650 kg of moon rock known to be on earth.
"The experience of holding a piece of another world in your hands is something you never forget," said James Hyslop, Christie's head of science and natural history.
A private sale will take place by Christie’s auction house of a piece of meteorite that was knocked off the moon that’s valued..