Chimps are old, dogs are new (in evolutionary time scales)
Chimps and man have had five million years to evolve from their common ancestor. Dogs have had only tens of thousands of years and can still interbreed with wolves and other canines. And there are other species of wild canines besides...
Wolves are not the only wild canines. There are various wild dog species all over the world including African and Australian dingos, Indian pariahs and in North America the Carolina dog. None of these canines would be mistaken for wolves nor is there any evidence that they were selectively bred...
An atmosphere for the moon would have to be something heavier than the nitrogen/oxygen atmosphere of the Earth. Something like sulfur hexaflouride which is six times heavier than air. It's also non-toxic and non-flammable. If enough of it could be generated on the moon to give 2 psi then humans...
The expanding universe is analogous to an expanding soap bubble, but with one more dimension.
Currently the bubble has a radius estimated to be about 46 billion light years. But the center of that bubble is a point lying outside of the surface of the bubble itself. We live in the surface of...
In standard LaTeX you use \bar{X} \bar{X} or \overline{X} \overline{X}.
As you can see, the \bar{X} is rather anemic and the \overline{X} is slightly too wide.