RAMADAN KARYM
KOLSANA WE KOL AL MOSLIMEEN TAYBYN
I AM Mohamed youssuf from giza it's my frist subject in this good web sitei was chosing an interesting subject to start with it my iddetion in this site to get agreament from all geologists here i hope that the subject gets your applity
If the diverse and numerous dinosaurs (except birds) are extinct, how can we better understand how they lived? Even though the great dinosaurs of the Mesozoic are gone, they have left us many clues. Dinosaur fossils are not limited to bones, but include skin, eggs, nests, footprints, and other special kinds of fossils that give us clues about their lifestyles.
Dinosaur nests
The news has recently carried several stories of wonderful finds of nesting dinosaurs, and it is true that an explosion of data on dinosaurian nesting and social behavior has been uncovered in the past 20 years. Some of the most well known and compelling evidence comes from Jack Horner's (Museum of the Rockies) ongoing work at the "Egg Mountain" site in Montana, where he has documented evidence of a large nesting area used by hadrosaurian (duckbilled) dinosaurs. These dinosaurs were named Maiasaura, "good mother reptile," referring to the closely packed nests that contain fossilized eggs, embryos, and juveniles (such as the one pictured at right). This is one case where we can be fairly confident that parental care was involved in these dinosaurs' lifestyle. Actually, this is not a surprising assertion, because both crocodilians (their closest living relatives) and birds (their living descendants), both show some degree of parental care and extensive nest building.
Other dramatic finds of dinosaur nests include theropod dinosaurs (Oviraptor and Troodon) that apparently died while brooding their nests, and abundant nests of the early ceratopsian dinosaur Protoceratops. An interesting story about Oviraptor: the so-called "egg stealer" was so named because it was found atop a clutch of eggs that were assumed to belong to Protoceratops. This idea held for some 70 years until a find in the 1990s showed an Oviraptor embryo inside one of those eggs..."egg
Be continued