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Message: <blockquote data-quote="SWBaxter" data-source="post: 2349398" data-attributes="member: 27926">Just because a thread like this isn't complete without a little math geekiness... it depends what you mean by "larger". The Earth is a little under 13000 km in average diameter, so if the diameter is 25% greater that'd make it around 16250 km. That increases the volume from around 9.2*10^21 m^3 to about 1.8*10^22 m^3, or about double. Assuming density remains the same, mass will also double, and if I've got my math right that means surface gravity is going to be on the order of 1.28G. Other variations on "larger" will produce somewhat different results. If this world operated by real physical and biological laws, then I'd expect flying creatures to be a lot rarer (magical flying creatures, like Dragons, would presumably be unaffected). Tall plants (i.e. trees) would need to have a much bigger surface imprint to be structurally stable, and probably wouldn't grow as tall. Animals would tend more towards short and stocky. Big animals would mostly be restricted to the oceans, where the water helps to support them. Fewer materials would be buoyant in water (i.e. more materials would sink) - this is because buoyancy depends on weight rather than mass, whatever civilized species you've got would probably be less nautical than on our world; their boats would need to be bigger in order to displace enough water to float. Missile weapons won't travel as far. Undoubtedly many other things change, too, it's all a matter of figuring out what changes, and how.</blockquote>

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