Richard Dawkins got his wings clipped over the weekend, following a claim on Twitter.

“Except for guys like these, not everyone really understands what’s inside.” So says Lehigh University biochemist Michael Behe.

Birds provided the initial inspiration for the Wright brothers’ flyers, and yet their first aeroplanes did not try to imitate flapping flight. Technology has advanced considerably over the last century, and yet still jet and airplane wings are mostly immobile. Can we learn more from the flapping flight of birds?

These scientists are lone voices affirming the most basic fact of human biology — unsupported by mainstream scientific journals and organizations — and they risk their careers for affirming publicly the biological fact that there are two, and only two, human sexes.

As it happens, these are all themes that are developed with great rigor and depth in Center for Science & Culture director Stephen Meyer’s next book.