Terra's Big Neighbor

[iancampbell]

Four - Another way of getting a planet some of which is habitable and some not is a planet with extensive high-altitude upland regions. Something about the size and height of the Tibetan plateau, on a planet otherwise generally like Earth except that sea level is about 2-3 bar of pressure and 60C or so, would probably be quite comfortable. (I'm not professional in this area, so the details might be wrong and probably are.)

In this context, I think it's worth mentioning that Venus has at least one area rather like that, at least in terms of height.