Kangaroos are the only large animals to use hopping as a means of locomotion. The comfortable hopping speed for Red Kangaroo is about 20–25 km/h (13–16 mph), but speeds of up to 70 km/h (44 mph) can be attained, over short distances, while it can sustain a speed of 40 km/h (25 mph) for nearly two kilometers. Given the body shape similarities, size and weight aside, can T-Rex motion mechanics be c...

Tonnes of cosmic dust hit the Earth every day. 66 million years ago, with less mass, the gravity level on Earth could be similar to Mars. Modeling different gravity levels for weight bearing might give us a better idea of the real speed of T-Rex and other huge creatures that couldn't exist comfortably in our higher gravity environment today. It could also be a way to work out the true gravity leve...

Looking at your videos, it looks like the spine is rigid, wouldn't the spine have been flexible, which and thus have a significant impact on the gate of the T. Rex?