|Collected samples of the Sutter's Mill meteorite|
Meteor astronomer Peter Jenniskens must move quickly to trap evidence of a fresh meteorite fall. In 2008, a small asteroid roughly three meters across struck Earth’s atmosphere over northern Sudan, producing a brilliant fireball in the sky. The asteroid’s orbit had been tracked before striking Earth, upping the chances that searchers would be able to locate pieces of the meteorite on the ground. So Jenniskens traveled to the Nubian Desert to recover fragments, as did dozens of searchers from the University of Khartoum.
For the rest of the story: http://blogs.scientificamerican.com/observations/2012/12/20/california-meteor-broke-speed-record-for-atmospheric-entry/