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Old 02-14-2017, 03:03 PM   #30
johndallman
Night Watchman
 
Join Date: Oct 2010
Location: Cambridge, UK
Default Re: Steampunk Mars/ Cold War crossover

Quote:
Originally Posted by tshiggins View Post
What makes liftwood so valuable is that its anti-gravity properties allows things to float without the use of any fuel. That makes it valuable beyond comprehension -- not because of the liftwood, itself, but because it provides a means by which 20th Century physicists can figure out how to generate anti-gravity.
Does liftwood just negate gravity up to a mass limit, or does it actually provide lift, allowing you to gain gravitational potential energy? If it's the latter, some laws of physics are going to need a rewrite.
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