People often cite how Vulcan may have different gravity to Earth, which in likelihood is true I guess.
but then, er... isn't it because they're different species with a different evolutionary path, and due to natural selection they evolved different capacities?

Gravity is not needed to explain that, right?
Take in the real world, humans and gorillas evidently live under the same gravitational conditions, but estimates state that gorillas are 27 times stronger than the average human. Why? Well they needed to be per their evolution, to control rival males, protect females and protect themselves from predators. As we became hunter-gatherers post-homo erectus, we didn't and still don't need excess strength.
it's like people who say "why do Klingons have redundant organs?" Maybe on Q'onos the near ancestors of modern Klingons needed to develop this due to environmental pressures. Maybe they were a predator species, and needed somehow to develop means to stay on their feet as it were for as long as possible.
but then, er... isn't it because they're different species with a different evolutionary path, and due to natural selection they evolved different capacities?



Take in the real world, humans and gorillas evidently live under the same gravitational conditions, but estimates state that gorillas are 27 times stronger than the average human. Why? Well they needed to be per their evolution, to control rival males, protect females and protect themselves from predators. As we became hunter-gatherers post-homo erectus, we didn't and still don't need excess strength.
it's like people who say "why do Klingons have redundant organs?" Maybe on Q'onos the near ancestors of modern Klingons needed to develop this due to environmental pressures. Maybe they were a predator species, and needed somehow to develop means to stay on their feet as it were for as long as possible.