At the end we gathered up the facts and weighed them on a real scale. I guess it turned out to be that T. rex was innocent of murder. He was probably a scavenger. Maiasauras took good care of their young. Scientists can tell this from clues they found in Maiasaur nests.
Dinosaur eggs have hard shells to protect the babies on land.
I learned a lot about eggs at this museum. Fish and amphibian eggs have to be layed in water, then fertilized by the daddy. They are soft and have no shells. Reptile and bird eggs are fertilized inside the mother and then layed in a nest. They have leathery or hard shells to survive on land.