You made this information concise and easy to understand. Thank you!

very interesting, and well explained. Thank you

thank you for this very clear explanation!

great video

Excellent.

that made total sense.

came from Robert Sapolsk's lectures.

Some walkways would have only been made arch ways because they are seen as beautiful and wanting to outdo is a great diver for humans =O arch ways didnt just catch on because of there usefulness a trait happening to be a side effect.. if it was an issue it might just faze out, like you said.. luck of the draw in that sense, but also you have only given examples of useful adaptation, or adaption that at least indicates levels of testosterone indicators of levels of hormones often become sort after, exaggerating the ones noticed or the ones that are useful.. in part because we can evolve to better express what is sort after

explained sweet and ters

Michael Behe- Darwin Devolves

Came here from Black Swan page 317 para5

came here from The Third Culture

the dudes pupils are really dilated.