Earthish is pretty much just like Earth. There are humans, amongst other, cooler animals. The humans, though, are less limited and puny as they are in our world. The colours in Earthish are wishy washy. Everything is subject to change. It was carved out of whatever was left lying around once the universe had gotten its shit together and finished all the other things on the to do list.
The population is dwindling, these days. Death is said to be an easier deal. Not that there's much to be worrying about, other than stock values, high winds and the sand that creeps inwards inch by inch, year by year. But hey, it's not all bad. Just unusually cold in the middle.