Terraforming website

The story about the space pen isn't true.
http://www.snopes.com/business/genius/spacepen.asp

How about adding Mars to Venus? Move them to a "Counter-Earth"
location and throw in Mercury if that isn't enough.

Then again, if you're going to smash Mercury, how about using it to
manufacture an unholy number of O'Neill habitats having a total
livable area hundreds of thousands of times that of Mercury, Venus,
Earth, the Moon, and Mars put together?