How ALM-A journeyed from its volcanic home to a lab in Germany is a complex -- and violent -- story. ALM-A and other chemically similar meteorites found on Earth are believed to have once been part of a primitive asteroid called the Ureilite Parent Body. That's the thing that would have been volcanic. Then, at some point, the Ureilite Parent Body collided catastrophically with another object, sending ALM-A and other bits out into space. Eventually, a mixture of gravity and electrostatic charge caused some of those pieces to re-form, along with other fragments, into the asteroid 2008 TC3. When 2008 TC3 came to visit Earth, it shattered again, this time into hundreds of pieces, miles above the surface of the Earth.