You may think you know how dinosaurs moved from pop culture, but a new study suggests the mighty T. rex may have moved at a more leisurely walking speed than you imagined.
In a study published Wednesday, researchers from the Netherlands shared their findings on the likely walking speed of the T. rex. They arrived at their conclusion through 3D reconstruction.
The researchers used Trix, a nearly complete T. rex fossil excavated by the Naturalis Biodiversity Center in the Netherlands, as the basis for their model.
To arrive at their proposed walking speed, the researchers didn’t focus on Trix’s legs — they examined its tail.
T. rex tails were suspended by ligaments in such a way that it didn’t cost the dinos any extra energy to hold them up. However, they bounced with each step, making them important to the researchers.
Using a 3D reconstruction, the team estimated the frequency at which T. rex tails would have naturally bounced up and down. To minimize energy use, T. rexes would have matched their steps to this rhythm.
To calculate a walking speed, the researchers combined the tail’s rhythm with an estimate of step length derived from an intact fossil of another T. rex’s footprint trail.
The team came up with a walking speed of 2.86 miles per hour. That’s much slower than previous estimates based only on T. rex leg length.
The slower walking speed proposed by the study is in range of what’s common for animals from humans to elephants, according to the researchers.
Aside from giving us a fuller picture of the prehistoric world, studying the movement of ancient animals can help scientists understand how they evolved into the animals of today.
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