On April 20th, 2016, 76 meteorites go up for auction at Christie’s London, including the only space rock to ever verifiably kill an Earth mammal. What are the details? Is it worth the estimated sale price? What can one get at the auction for a million dollars?The killer space rock is the so-called Valera meteorite, named for the city in the Trujillo State of Venezuela where, on October 15th, 1972, it killed a cow in the only documented instance of an Earth mammal meeting its demise as a result of getting hit directly by a meteorite. Farm workers heard a sonic boom that night, then found the rock buried into the ground next to a cow dead from a “pulverized” crushed neck and collarbone. The farm’s owner, physician Argimiro Gonzalez, confirmed the death-by-meteorite, had the cow butchered for dinner and used the space rock for a number of years as a doorstop.