Other Universe Sites:
The Universe - Everything you could possibly want to know about the Universe is here.
Sites of other nations:
The Greater Federation of Asteel
Mars Links
The Case For Mars - A cornucopeia of Mars links, including links to ongoing missions, image banks, terraforming, current Martian weather and lots more. The rest of the links in this section have all come from here.
Red Colony - A scientific website dedicated to the colonising and terraforming of Mars.
Franz Blok's website - A Dutch Mars enthusiast who has maps of what Mars will look like after terraforming (one of which I borrowed for this site), a map of Kim Stanley Robinson's post-terraforming Mars, and an alternate timeline for Martian colonisation and indepedence.
Malin Space Science Systems - The Californian company that processes the images from Voyager, Mars Global Surveyor etc. Great images of Old Mars, and of course the infamous Cydonia region, home of the 'face'/mildly face-like mesa, 'pyramid' etc. Forerunner carvings, or the product of an overactive imagination? You decide...