106,000,000 years BC, there was a certain type of omnivorous dinosaur that had evolved to be able to survive in the very cold climate of Antarctica. They were called Leaellynasaura and were only two metres long. Being small made it easier to survive because there was less body weight to carry around meaning they needed less energy and therefore less food. They lived in small clans dominated by one leading pair.
In Antarctica, there was no light for two months during the winter and then during summer, the sun never set for five months. Leaellynasaura's eyes adapted, by growing bigger so they could see during the two months of darkness.
During breeding time, the Leaellynasaura's would collect dried leaves, ferns and twigs to build a nest for the eggs. Once the eggs were laid in the nest, the mother would check the temperature of the nest to make sure it is the right temperature for the eggs to develop correctly. After some time in the eggs, the unhatched dinosaurs could be heard responding to their mother's vocal clickings.
Something I found funny, is that when an egg thief comes to steal eggs, they way the Leaellynasaura's defend their eggs is by facing their rear to the egg theif and flicking dried leaves and ferns through their back legs, towards the egg thief. (the same way that a dog will do with dirt when they're digging).
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