Welcome to Thrae

Sometime in the Era of First Edition, perhaps around the Year of our Lord 1984, two young brothers were introduced to the Moldvay edition of Basic Dungeons and Dragons. Since then, the world that is now known as THRAE has had countless visits and explorations from both brothers. Stories, adventures, campaigns, even entire manuscripts have been created within its many lands and seas.
Some aspects of the world may seem familiar. Some may seem surprisingly familiar. Some may even seem blatantly stolen. We prefer to see these features of Thrae as literary or imaginative homages rather than intellectual theft. While we recognize that there are many aspects of our world that are less than original in concept, we have left them as is for their nostalgic reality rather than any sort of claim to intellectual property. This is the almost inevitable result of more than 40 years of imagination and vision being fleshed out by a pair of flawed writers/roleplayers/campaigners and not an attempt to establish some form of literary permenance or propriety.
Let it be enough to say that, over the last 40 years, Thrae has gone from a very nebulous concept to one of growing depth and constancy. Much has been fleshed out, much has yet to be discovered.
Thrae is a planet orbiting a G-type main sequence star at a distance of 93,000,000 miles over the course of 365.25 days. It's day is measured at 24 hours in length and it has one moon that has an orbital period of 29.5 days.  Thrae has a circumference of 28,000 miles (due mainly to a 35-year-old error in calculations that is simply easier to ignore than correct) and an axial tilt of 23.5 degrees meaning there are distinct seasonal changes in climate experienced all over the globe.
In other words, Thrae is very, very like Earth. What is different about Thrae is its geography and its evolutionary path. The planet looks very different than Earth and has had a very different evolutionary history. Some extinction events have coincided, while others have not. Many forms of life on Thrae have identical forms on Earth... but many do not.
Thrae has four very large continents, two of which would be considered super continents on Earth. The size of these continents when compared to Earth's means the ratio of water surface to land surface is very similar between the two worlds.  Earth's last ice age began to end roughly 12,000 years ago, but Thrae has only been warming for about 6,000 years.  Glaciers on Thrae are far more extensive than on Earth, with the polar latitudes reaching as far south as 60 degrees or more and global temperatures are measurably cooler on Thrae.
Where Earth has one (or, at best, a small handful of) sentient species, Thrae has many. Some are human, many are humanoid, and many others are completely non-humanoid.