Every kind of seaweed is edible. Most of them taste horrible. So we should never run out.
At 1,000 km per hour, the length of an aircraft becomes one atom shorter.
Sorry mate, I dispute that 'fact'
Whilst at supersonic speeds (+1,238 kmh) Concorde would actually get longer, as much as .3m (just under 12 inches).
This was due to the heat that was generated though, so there may be some truth in what you say but only until you get to supersonic speeds (maybe?)...
hmmm, anybody qualified enough to clarify this?