This will be on display for the first time later this year since being discovered in 1984. There are more than 160,000 fossils going on display with it including a 200 million year old imprint of a lizard on a rock at a time when Earth’s continents were just beginning to separate! More about the ‘Turkana Boy’ here.
Found an interesting site on the origins of Earth: http://www.talkorigins.org