Sixty round eggs from China, part of the Dinosaur Egg and Embryo Project, have been soaking in weak acid for months. Manning and his colleagues believe three different dinosaur species may be represented in this collection, but only time will tell.
I was very excited the first time I found bone, Manning recalls, and even after examining hundreds of eggs, I am never certain what will be revealed, bones or something else. It happened again only a few weeks ago. A large piece of shell came away revealing a bone underneath. Instant gratification! However, for the most part it takes a week or two before seeing anything, and even then it is difficult to make any sense of it.