A small chunk of rock believed to be a fragment from a meteor that burst into a stunning fireball over Wisconsin Wednesday night was discovered by a farmer after it fell on the roof of his shed.
The meteor fragment is peppered with gray, white and reddish minerals, though one side is covered in what scientists called a "fusion crust" – a layer of dark material forged during the meteor's fiery passage into Earth's atmosphere. It weighs just 0.2 ounces (7.5 grams) and is about 2 inches (5 cm) long and less than an inch wide.
A camera mounted to a campus building at the University of Wisconsin-Madison caught the Wisconsin meteor's explosive demise. The meteor's sonic boom and explosion were also seen and heard by numerous witnesses, and sparked frantic 911 emergency calls across six different states, according to the Near-Earth Object Office at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, Calif.
