Jets, turboprops, etc. do not use leaded fuel. Most burn a form a kerosene with different additives depending on the grade / rating.

Leaded Avgas is used in piston engines where the tetra-ethyl-lead additive is used to decrease knock (pre-ignition) by increasing the octane rating. Piston engine aircraft are primarily used in the light / general aviation world and not in commercial or military aircraft. So you would have more exposure near smaller municipal or regional airports where these planes operate.

Great amount of info via the FAA on this: https://www.faa.gov/newsroom/leaded-aviation-fuel-and-environment

[removed]

Humans evolved with the technology of fire. Digesting raw meats is something that humans are not so good at anymore. It takes more energy from the body to process most raw meats than cooked meat. And our teeth aren't adapted for raw meat.

So I think it would be a net negative to try to go back to this.

[removed]

I don't think it is the exact same gait as gallop, I just see the way he run look similiar to gallop or canter of other animals so I asked. You are right about people use the word gallop loosely. But I understood it now.

Canter is a 3 beat gait with two of the four legs moving in unison. Although it originates in the hindquarters the beat of the gait itself is often counted as 1. One front leg (lead) striding out, 2. Opposite front leg and diagonal hind leg moving in unison, 3. Opposite hind leg and the pattern repeats 1 2 3, 1 2 3 It is often counted that way especially from the ground because one fore leg seems to be leading - a left lead or a right lead. A right lead would originate with the horse pushing off the left hind, then the opposite diagonal pair moving together, then the right front leg. Either way you count it, the actual gait and rhythm is the same - 1 2 3. Gallop is a four best gait with a moment where all four feet are off the ground.

https://learninghorses.com/canter-vs-gallop/

This is not how an elephant moves

[removed]

Because the trade off is extremely rare. Humans became bipedal to travel great distances, other animals either can do that on four legs, or were evolved to live in trees. Our evolutionary history is quite unique, we are descended from climbers/tree dwellers, and then went back to land.

[removed]

[removed]

[removed]

It’s called digitigrade and dogs & cats show this orientation of the foot & ankle bones. Because your fingers & toes are “digits”. When you walk flat footed like a human, it’s called plantigrade, and the bottom of the foot is the plantar surface.

[removed]

All mammals have to same bone structure in the limbs. All the bones in human ankles are in elephant ankles. Sometimes the bones are fused or repositioned, but they’re there!

[removed]

[removed]

[removed]

[deleted]

There's no lead in jet fuel.

Leaded fuel is only in Avgas used by piston engine aircraft. It poses similar dangers as lead did in vehicle fuel. Google your question and you'll turn up any number of studies.

[removed]

It doesn't matter what you think a gallop is. People may use that word loosely all the time. An actual gallop, however, requires all four feet to be off the ground at the same time. Elephants are physically incapable of moving in this way.

[removed]

>The fact elephants have 4 forward facing knees also prevents a gallop.

That's inaccurate. Elephants have knees and elbows that bend the same direction as any other mammal's.

This skeletal diagram is an easy illustration - https://imgur.com/HtrRcOb

And here you can see the elbow joint vs knees on a living elephant - this elephant has its elbows bent backwards as normal, and its wrists pressed against the ground as it's 'kneeling' to dig.

I am agree that the gait is not natural. But actually my point is many sources say elephants are physically incapable of catering or galloping because of their anatomy. Isn't that's mean he should not be able to run like that at all even when forced?

[removed]