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If the Earth were 3x heavier, birds wouldn't be able to fly, at least not the way they are now. Sparrows can barely get airborne when they're full, let alone at
by CobrastanJorji 7y ago
If the Earth were 3x heavier, birds wouldn't be able to fly, at least not the way they are now. Sparrows can barely get airborne when they're full, let alone at triple their weight.
- ars 7y agoAir density would be three times higher though. So they might still be able to fly.
- CobrastanJorji 7y agoOoo, that's a good point!
- icebraining 7y ago> at least not the way they are now. Yeah, but they wouldn't be, because the extra mass would have influenced their evolution.
- rexer 7y agoExtra weight. If gravity is the only thing changed, mass would remain constant.
- icebraining 7y agoSince the discussion is about "earth's gravity", I'm assuming the change would be in its mass, not in the universal gravitational constant, which is not Earth-specific.