4 ms·

Isn't the condor still much more efficient. How many calories does a cyclist need to travel 100 miles?

• DannyB2 6y ago
  I'm just repeating it as I remember it after nearly 40 years. :-) Back in the day, there wasn't Google, Wikipedia, Snopes, etc. or I would have looked it up back then.
• linuxftw 6y ago
  Humans in orbit for long periods seem like they'd be the most efficient.