Eocene Epoch, a division of geologic time that began about 54,000,000 years ago and lasted about 17,000,000 years. It is the second epoch of the Tertiary Period. During the Eocene, mammals were the dominant form of animal life. Among them were the ancestors of today's horses, pigs, whales, rats, camels, and monkeys. Reptiles and birds were also common. Plants included elm, maple, beech, and walnut trees.
It's not so much about time as it is about money. What dictates how long an archeological team is permitted to dig at a particular site?
Dinosaur eggs and the embryos inside can teach us a lot about dinosaur reproduction and behavior. But how do scientists get the rocky embryos out from the equally rocky shells?