After watching last night's Horizon (about the potential of discovering life elsewhere in the Solar System), I was intrigued by the pictures of Mars with oceans (to illustrate a possible ancient Mars with seas of liquid water). Of course, the shape of the coastlines may well have changed in the billions of years since there were (potentially) oceans on Mars, but the images on this site might be useful for GMs looking to base an adventure on a near-future terraformed Mars or Venus:
Interesting. In the Extended Whoniverse Mars was terraformed to the point that unprotected (and unmodified) humans could walk the surface IIRR. I don't remember much about Venus, I haven't listened to Voyage to Venus or Venus Mantrap.
Chris Wayan did some excellent work on maps of terraformed Mars and Venus, including sea levels, cities and more. Mars, Venus. He has a number of other ideas, like an Earth after extensive sea level raise that could be a setting for a Who game (complete with submarine tourism of Old London Town!) and many more.
Time, time,time, see what’s become of me. While I looked around for my possibilities... My AITAS files.
I don't remember much about Venus, I haven't listened to Voyage to Venus or Venus Mantrap.
Venus was habitable and a complex civilisation developed on it billions of years in the past, as seen in the novel Venusian Lullaby and the Señor 105 novella By the Time I Get to Venus (and covered in The First Doctor Expanded Universe Sourcebook). But it's already heating up, with the extinction of the Venusians becoming inevitable.
In the present day, creatures nicknamed Wispies by Clara live in its acidic atmosphere (in the short story Sunset Over Venus).
By the time of Venus Mantrap in the early 27th Century, Venus is still uninhabitable but it has a pair of artificial moons, Eros and Thanatos.
And at some point in the further future, it's terraformed and becomes home to one branch of humanity after Earth has become a barren rock (as seen in Voyage to Venus).