Why are there no animals with three legs?

If "Why?" is the first question in science, "Why not?" must be a close second. Sometimes it
If "Why?" is the first question in science, "Why not?" must be a close second. Sometimes it's worth thinking about why something does not exist.

Are there any animals with three legs? - Quora

Why are there no three-legged animals?

A Wilder View: Why aren't there three-legged animals?

Four Limbs Good, Three Legs Bad? UC Davis College of Letters and Science

Cognitive Navigation of the Elements as Indicative Strategic Metaphors

क्या हैं 3 पैरों वाले जानवर का गुत्थी! - Why Are There No Animals With Three Legs ! – Vigyanam

Scattered Silver Cubes Scale Up Light Absorption for Solar Power

Tracy Thomson's Instagram, Twitter & Facebook on IDCrawl

People Are Having Trouble Understanding This Dog Picture

Meerkat Fact Sheet, Blog, Nature

Why are there no animals with three legs? - Futurity