Dinosaurs and the reduced felt effect of gravity

That there were leftover dinosaurs well into the age of man appears certain at this point, from petroglyphs and other iconographic evidence

COELODONTA antiquitatis - Wooly Rhino
This creature was a huge beast that lived in during the last ice age. The Coelodonta had a massive body and a thick, shaggy coat that protected it against the harsh climate of the tundra and steppe that bordered the great glaciers of the Northern Hemisphere. Coelodonta had a pair of huge horns on its snout that reached lengths of up to 3ft in the largest of males. These creatures were hunted by early humans and they were depicted on the walls of caves in France 30,000 years ago.

My usual practice in forums is to reply to intelligent posts and ignore non-intelligent posts. You figure to get ignored a lot by that standard.

Note the long neck of the stegosaur would be in an area of unpainted rock on the petroglyph, so there is no way that it could have been altered by "touchups" ... and when you are done with that, compare the lengths of the legs on the (model) skeleton front and back -- rear legs are almost 2x the length of the front legs. On the petroglyph the front legs as long as the rear legs, again like a bull. Finally look at the scale of the plates along the back between the real model and the petroglyph. Orders of magnitude wrong again. These are not errors that would be made by people familiar with the actual creatures.Like I said before, these kinds of pages rely on sensationalism based on incredulity, gullibility and lack of awareness regarding alternates. Another word is ignorance, which is curable through education of the willing.

Robert T. Bakker, "The Dinosaur Heresies"
William Morrow and Company, IncAll dinosaurs had bigger cneimal crests than do elephants, even those groups with relatively straight hind legs -- the giant horned dinosaurs, stegosaurs, and brontosaurs. When these systems of oversized knee muscles contracted, the power exerted on the hind paw would have had no equal today.In addition, the attachment point on the pelvis for the knee extensors is the "ilium", and it, too, is of exaggerated size relative to mass in dinosaurs. Bakker shows the relevant musculature of a ceratopsian leg in a diagram (seen here).Bakker's position is, the cross section of tendon attachment points implies that dinosaurs limbs were subjected to forces equivalent to those running and walking in 1g. It is rather direct evidence against there having been any lower "felt effect of gravity" as Ted claims necessary.

Hokkanen, J.E.I., 1986. "The Size of the Largest Land Animal"
Journal of Theoretical Biology, v.118, p.491-499.Abstract: The upper mass limit to terrestrial animals is studied using physical arguments and allometric laws for bone and muscle strength and animal locomotion. The limit is suggested to lie between 10^5 and 10^6 kg. A possibility for a still larger mass, in case of new adaptations, is not excluded.

Palaeos Vertebrates 330.200 Sauropodomorpha : SauropodaSauropods were long believed to be semi-aquatic swamp wallowers, relying on the bouyancy of water to support their massive bodies. But analysis of their skeletons, in comparison with those of large terrestrial and semi-aquatic animals, and of sedimentation where their fossils have been found, show that sauropods were fully terrestrial: [Walter Coombs, p.1]Not only were sauropods as terrestrial as elephants, but fossil trackways indicate that they lived in herds, again like elephants today. It must have been a truely awesome sight to watch a herd of brontosaurs crossing a Mesozoic floodplain; evoking the same sense of awe, and puniness in one's own being in comparison, as one would feel when observing whales close up.The Sauropoda include the largest animals ever to walk on land. These gigantic herbivores reaches lengths of 15 to 25 metres or more (the very largest may have reached 45 metres) and weights of 15 to 30 or even 50 or 60 tonnes. Previous estimates of 87 to 150 tonne animals are unrealistic and physiologically impossible. No sauropod ever equalled in size the greatest of the baleen whales.

Quetzalcoatlus! The largest flying creature of all timeBy 1975, studies of the specimen by Lawson and his supervisor, Wann Langston, Jr. Had determined that the animal, a 65 million year old pterodactyl from the Age of Dinosaurs, had a wing spread of about 40 feet, greater than a 4-place Cessna airplane or an F-18 fighter. It was about twice as large as the biggest pterodactyl known up to that time. With the discovery of additional, though smaller, fossilized skeletal remains in the Big Bend in 1973, it was possible to reconstruct the entire skeleton of the pterodactyl which Lawson named Quetzalcoatlus northopi. Based upon what had been learned from these discoveries, the world-renowned aeronautical engineer, Paul MacCready, with the assistance of Professor Langston created a large flying replica of Quetzalcoatlus which performed over the California desert for the Smithsonian Museum's IMAX film "on the Wing" in 1985. Lawson's discovery attracted world-wide attention, being reported in newspapers and magazines and on TV from New York to Tokyo and Canada to Argentina. "On the Wing" was shown around the world. ABC 20-20, the news program, produced a 20 minute segment on MacCready's work, and Sir David Attenborough traveled to Texas to film segments for his BBC series "Lost Worlds - Vanished Lives." Quetzalcoatlus continues to attract attention within scientific circles and the press because of the exciting questions it raises about how the long extinct pterodactyls flew, how big a flying creature can be, and why such successful animals went extinct along with the dinosaurs sixty-five million years ago.

If there was a change in gravity as Ted Holden and his gullible cohorts contend, then the model should not be able to get off the ground.