Learned something that wrinkled my brain.

[pembquist]

I remember reading somewhere that skipping is more efficient than running...

Only if you sing while doing so.

[Shuffler]

At my age if it is very far I run.... out to my truck.

[Zimme83]

Unless you are the predator.

Then you also have to be fast enough to catch your prey. And most animals cannot afford to chase a prey for a day before they kill it. And again animals needs to survive in colder climate without clothes so they cannot have a bare skin that sweats.

[FLOOB]

And that's why we win.

I can't find any polar bear 100 mile run times.

[PR3D4TOR]

Heat dissipation/management is the ultimate limiting factor of all energy systems.

[Brooke]

Humans can survive on food that would kill other animals except for rats and some insects.

Humans live in more different environments than the vast majority of other organisms, including rats and insects.

Humans ueber alles!

[Zimme83]

And that's why we win.

I can't find any polar bear 100 mile run times.

Polar bears swims, over loooong distances.

[PR3D4TOR]

Polar bears swims, over loooong distances.

https://en.wikipedia.org/wiki/Beno%C3%AEt_Lecomte

[OldNitro]

Humans live in more different environments than the vast majority of other organisms, including rats and insects.

Humans ueber alles!

Only because of our technology. Without it, we'd still be prey for the wolves.

[FLOOB]

We domesticated wolves before we had any technology.

[OldNitro]

We domesticated wolves before we had any technology.

Dogs and Wolves are two different things.
In some remote parts of the world, like Manchuria, Siberia, even in remote parts of Spain, wolves are still a threat. Hardly domesticated! But they say a pack of feral dogs in Detroit can be pretty nasty too.

Thinking about it. Our Technology probably started with a sharp stick, so I wonder if dogs were domesticated before that? I mean, when man first started to eat meat, we became the canines competitor for food. Back then, humans were prey for the canine species.

Interesting question!

[PR3D4TOR]

The closest living relative of the dog is the gray wolf and there is no evidence of any other canine contributing to its genetic lineage. Humans domesticated wolves and over thousands of years bred them into the various races of dog we have today. Selective evolution.

Humans did not invent the sharp stick. Earlier hominids did that long before us.

[OldNitro]

The closest living relative of the dog is the gray wolf and there is no evidence of any other canine contributing to its genetic lineage. Humans domesticated wolves and over thousands of years bred them into the various races of dog we have today. Selective evolution.

Humans did not invent the sharp stick. Earlier hominids did that long before us.

There are Canine species that predate the Grey Wolf, by eons. Also how do you explain the Australian Dingo, African wild dogs, that are different line than the Northern Wolf species.

Just like Chimps Gorillas and Orangutans are all Primates, but different species.

[PR3D4TOR]

Canine is a genus in the Canidae family and contains multiple extant species, such as wolves, dogs and coyotes. The domesticated dog is genetically only related to the grey wolf. The African wild dog is a separate species on its own branch of the Canidae family tree and is not related to either the grey wolf or dog. The Dingo is descended from domesticated dogs from East and Southeast Asia, which returned to a wild lifestyle when they escaped from fishermen who were stopping to get fresh water in Australia. Both the dingo and domestic dog are classified as subspecies of the gray wolf (Canis lupus).

[NatCigg]

really fascinating stuff.  In all this time, nothing more than elements and some complex molecules have come from space.  Other earths would be on a similar time scale if you consider the universe is only 14 billion years old.  that's under 4 earth lifes. The sun is only 4.5 billion years old, so life got started almost as soon as it had a chance.