Wandering Adventure Party

@WizardOfDocs @Akki @KaraLG84 @ShaulaEvans

Sort of, I think! Owls need to be silent so they evolved feather-shaping mechanisms that suppress vortex-shedding. Pigeons don't, especially, so with cost and no benefit they didn't get them.

@Mux @Akki @KaraLG84 @ShaulaEvans

Ooh, neat!

@Akki @KaraLG84 @ShaulaEvans

I don't really know much about butterfly flight, but I'm pretty sure fly flight is entirely based on the shedding of vortices from the wing edges. They make the air very chaotic and somehow (aeronautics is not my field!) get lift from that, and the pulsed vortices make the buzzing sound, as I understand it.

@ShaulaEvans

More? I got lots of these.

@ShaulaEvans

… and then the very tips are formed from little membrane sacs inside the cells (the technical term is "vesicles") that line up and fuse together to make incredibly fine tubes that fill with air. Oxygen-starved tissues send out a signal that nearby tracheal cells respond to by growing more of these tube-tips in their direction.

@ShaulaEvans

Oh man I am an Insect Professional.

I don't know their level, though. Do they know that insects don't have lungs? They don't use their "blood" for gas exchange (which is why it's not technically referred to as blood but we say "hemolymph"), but instead the tracheal system completely penetrates the body, bringing oxygen directly to all the tissues with a system of microscopic air-filled tubes. The main branches are a couple cells around, the finer branches just one cell around …

@wendinoakland @APBBlue

Also consider: #MardiPatisserie

We love a fractal vegetable.

Please remember that "Red Tape" is why there's no sawdust in your bread and the nearest river has not actually caught on fire lately.

@AngelaPreston

A million years ago, the bank where I had an account merged with Fleet. I only had one association for that brand name. And when I got home from work that night, I said to my husband, "I've been sold to the enema bank." And without the slightest pause, he replied, "Colonial?"