Birds had to relearn flight after meteor wiped out dinosaurs

Re:Birds had to relearn flight after meteor wiped out dinosaurs by soared on Friday May 25, 2018 @03:23PM (#17157022)

Any other info or a higher res for that graph? That totally goes against what I would've assumed! (Trains are wildly inefficient?! Swimming is more efficient than flying or running?)

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Re:Birds had to relearn flight after meteor wiped out dinosaurs by mjmahone17 on Friday May 25, 2018 @03:40PM (#17157178)

I think you’re reading that wrong. Trains are nearly the lowest energy/kg per unit distance travelled, as they’re in the bottom of the graph. Though it’s a bit weird for the x axis to be mass, too.

Basically the y axis is a measure of efficiency. The x axis just spreads out the points so you can compare things of similar mass.

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Re:Birds had to relearn flight after meteor wiped out dinosaurs by soared on Friday May 25, 2018 @04:31PM (#17157663)

Oh I was reading it wrong, thank you. Its hard to see on mobile. Glad to hear trains are efficient again though.

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Re:Birds had to relearn flight after meteor wiped out dinosaurs by saagarjha on Friday May 25, 2018 @03:32PM (#17157102)

If you have fins and are streamlined like a fish, I'd assume it doesn't take a whole lot of effort to move.

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