Well Dingos are just feral dogs themselves, same as the prtzewalski horse, which also is just a feral and not a wild horse.

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Recently tests found that all eastern Coyote are hybrids

https://scitechconnect.elsevier.com/eastern-coyotes-hybrids-coywolf/#:~:text=New%20genetic%20tests%20show%20that,geographic%20location%20of%20the%20canine.

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Just a small example is between two different species of ‘fire ants’.The two different species of Solenopsis invicta (RIFA) and Solenopsis xyloni often have alates that mate with members of the other species,making workers that are a mix in colour of the two species.

>the entirety of the universe becomes a dense point which condenses into an infinitely massive black hole? Which then collapses and causes a big bang event.

While theoretically possible, we don't see enough observable evidence to support this.

Additionally, think of this. At what specific point of size/mass would a black hole actually "explode" into another Big Bang? As far as we know, each black hole that currently exists at any size or mass is already infinitely dense. Even if you combined all the matter in the Milky Way Galaxy into one black hole, it would still be an infinitely dense black hole, it can't get any more dense than it already is. It *would* become more massive and have a larger event horizon.

But there's nothing fundamentally different about a solar-mass size black hole and a galactic core black hole, aside from just being much much more massive. Again, as far as I'm aware.

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Coyotes and wolves have fertile offspring but still considered separate species.

There is debate about whether wolves and dogs are separate species or not.

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Not sure If we are classed as wild, (that's up for debate) but there are a lot of apperently none African folks walking around with a low percentage of Neanderthal genes..

I find it interesting on many fronts but raises the question has that been a constant low percentage or something that has been lowering over time since cross breading and Neanderthals disappearance?

What's the difference between viscosity and cohesion?

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So would tar be less sticky in a vacuum?

There are examples of animals that are considered different species that also produce fertile offspring. The most well known one is the grizzly and polar bear, but it's also quite common amongst whales.

Dark energy (which I discussed) and dark matter (which I didn't) are completely different things.

A universe with only dark energy (or where everything else is negligible) expands exponentially, i.e. if you follow the distance between two objects over time then this distance increases exponentially. It has a constant expansion rate. If you emit light at a distance where the distance increases at the speed of light then the light will always keep that distance - the expansion perfectly matches the speed of the light, and the expansion rate doesn't change so the light will never come closer.

In our universe, where matter still plays a role (~3/4 dark energy, 1/4 matter today), the expansion rate is decreasing a bit. Light emitted at the same distance of "light speed distance increase" doesn't get closer to us today, but it will start getting closer "tomorrow" (will take hundreds of millions of years before this is significant, of course).

Only female ligers are fertile, males are sterile. This is part of why we still consider lions and tigers to be different species not subspecies