Yeah, evolving lungs ended up clearing the way to make use of the much more plentiful oxygen in the air compared to what is dissolved in water. Amphibians and reptiles have pretty low metabolisms, but birds and mammals basically evolved endothermy (aka warm bloodedness), probably in support of much higher muscular power output. Ectotherms (aka cold blooded animals) have metabolisms that are correlated to temperature, which means they can’t exert themselves as well when it’s cold. Endothermy allowed animals to be warm all the time, and therefore use higher muscular power output in any environment, especially sustained.

That means mammals and birds were able to cover more distance, and survive in places where reptiles and amphibians can’t, and all the advantages that carries.

This article estimates at a 40kg sailfish uses about 2.7 megajoules per day of energy when hunting. That’s about 650 kcal.

An 80kg human weighs about twice as much and needs about 3 times the energy, without even exertion.

Warm blooded animals spend a lot of energy just maintaining body temperature. Plus water doesn’t have very much oxygen in it, compared to the atmosphere.

There’s not enough oxygen in water to support our metabolisms, even if we had gills.

Fish are adapted to conserve and use less oxygen, from slower metabolic rates to more options for anaerobic respiration that doesn’t poison oneself from within.

$83 billion per month is almost $1 trillion per year. That sounds about right.

No such thing as an NDA that allows a spouse to work in the same room, and allows the spouse to actually be on video while blurred, but draws the line at not being able to unblur the video.

Shouldn’t the DE/Window Manager be handling that? Seems like doing it on a window by window basis would be inefficient (and look inconsistent).