National Geographic : 1960 Sep
bone of a giraffe. Quickly the two hauled it to where I was working. "Why, it's a bird," I exclaimed, "but what a giant!" Now at last the riddle of the eggs was solved. Examination proved that the bird was indeed a giant, a member of the ostrich family. In size it may well have overshadowed the extinct moa of New Zealand, the largest of which stood about 12 feet high. How to Find Fossils: Crawl Indeed it became clear that Olduvai was a site such as none other in all the world. That is why, ever since 1931, we have gone back again and again, certain that sooner or later we would find, as we have done, evidence of the earliest men, and perhaps the remains of the men themselves. To give a clear picture of our work, I should describe the Olduvai diggings briefly. They are scattered over the floor and slopes of the gorge, some sites separated from others by a mile or more. The earliest fossils - those among which Zinjanthropus came to light-are in what I call Bed I, the bottommost layer (page 425). 429 o NATIONALGEOGRAPHICSOCIETY In semidesert, the campsite lies 35 miles from water; trailer tanks must travel to a spring on the rim of Ngorongoro Crater (map, page 422). Boxes hold supplies, fos sils, and Stone Age tools. The tent shelters food and dining tables. Baking bread offers a respite from Dr. Leakey's quest for man's remote ancestors. Two metal bowls, one inverted atop the other, form his oven. With hot embers beneath and a fire on top, he says, "in 20 minutes I have beautifully baked bread for myself and my family."