Log in

No account? Create an account
June 26th, 2009 - Off in the distance — LiveJournal
my journal
May 2016

The Bellinghman
Date: 2009-06-26 10:50
Subject: Did bipedalism evolve from high acceleration?
Security: Public
Avoiding 'wheelies' slows animals: The acceleration of four-legged animals appears to be limited by their need to avoid tipping upward, thus losing traction as their legs miss the ground.

This is interesting. The first creatures we know of that had high 'warm-blooded' metabolisms were the dinosaurs. And the dinosaurs were the first group of creatures that started using bipedalism. (Not all, of course, not the slow browsers.) Perhaps they became two-legged because once you have so much muscle power that you start rearing up when you try to rush, you might as well go with it and put all the power into the legs that stay on the ground.

It'd also explain why cheetahs have non-retracting claws: those claws aren't primarily for attack, they're for extra grip.

(If I recall correctly, a good sprinter can beat a racehorse off the line - just not over the first furlong.)
3 Comments | Post A Comment | | Link