From the March 9, 1935, issue

AVIATION PROBLEMS SOLVED UNDER WATER

Mankind is more than a little proud of itself for having, at long last, learned the trick of flying. Takes brains to do that kind of thing, we tell ourselves with an unconcealed smirk.

Yet hundreds of millions of years ago, the remote ancestors of our present-day fishes, with scarcely any brains to speak of, solved a very similar problem for themselves, and in a very similar way.