Why do creatures only grow to certain sizes?

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Basically i just saw a post about a massive black widow spider living in an electrical box and it got me thinking. Why is growth limited to a “general size” in most cases? Is it just natural genetic code that says ” You will only grow this much and no more”, or does it all depend on stuff like environment, nutrition, risk factors, etc?

In: Biology

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Anonymous 0 Comments

Any given body plan only works in a fairly narrow range of sizes. The larger you get, the bigger your weight, which increases as your volume increases. However, your leg strength for example would only increase as its cross-sectional area increases. Volume is a cube, area is a square, so volume/weight increase much faster than the supportive strength of your legs and your musculo-skeletal system. In real life, Godzilla should be mostly legs.

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