Dolphins were 4 legged mammals that adapted to water and it looks

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I think the fact that dolphins evolved to breath out of their backs instead of their mouth is weirder than them being mammals. How did this happen?

>>8687716
It's not out their backs, it's on the top of their heads. Imagine our noses moving slowly upwards and eventually it became the blowhole we know and love

>>8687739
I am now embarrased that i have lived on this earth for so long without knowing that a dolphins mouth is not connected to its trachea

>>8687716
Ancestrial dolphins most likely didn't have hemispheric sleep, so they needed to keep their noses above water to breathe. Over time evolution favored those with higher noses, as it takes less energy to stay afloat with the less above water surface area you have. Over time noses just got higher and higher until it was just at the top of their heads.

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>>8687739
http://evidentcreation.com/?p=491

>>8687680
there's no teleology in nature, organisms don't seek to reach its "most efficient design", they just seek to survive and reproduce.

>>8687680
Nah, big birds have us beat. We didn't evolve alongside them though, so we weren't in competition. Dolphins were in competition with sharks from day 1, so they had a much stronger evolutionary drive.

>>8687680
we are just getting started

dolphins have already had 50 million years to adapt to water
humans only changed to bipedalism 7 million years ago

as you ca see from the picture human skeleton is barely different from our cousins

back pain is still very common
If you stay a lot of time standing up for years your leg veins are going to suffer

We're not "getting started".

Evolution happens if there's natural selection or sexual selection.
We're not going to kill off people who have backpain and prevent them from reproducing, we're going to give them painkillers and corrective surgeries.
We're not going to kill off people who have myopia (over 20% of the human population), we're going to give them glasses and corrective surgeries.
The only way for humanity to "move forward" evolutionarily speaking is if there are huge plagues that medicine cannot contain, or through genetic engineering.
Otherwise a million years can go by without significant changes in the human genome.

>>8687767
Same senpai

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>>8687680
>and there is no other animal that has done that for billions of years
Nice try Aussie. The emu holocaust is real!

>>8687716
How is it even routed? Does it go through/in front of the brain or does it split and go behind it?

>>8687767
So how does it make that noise?

>>8689450
But more and more men will die childless since the sexual revolution, so there's that.

People seem to be getting stupider, maybe that's Chad's genes "getting started" on the human genome.

Humans are either the best design evolution has ever created or the worst, depending on if we kill ourselves or not

>>8687739
So... the blowhole starts at the nose, passes through/around the brain, and then is on the backside. What? Or was there a deformed freak one day with an opening on the back of its neck?