View Single Post
Old 05-06-2012, 08:02 PM
kanicbird kanicbird is offline
Join Date: May 1999
Posts: 18,551
Originally Posted by Quartz View Post
Submarines have propellors; whales have flukes; fish have tails. Which is the most efficient? And what about quietest and least-easy to detect?

(I'm not sure if there are any fish large enough to really count, even if you include the whale shark.)
I thought penguins were the most efficient.

Last edited by kanicbird; 05-06-2012 at 08:04 PM.