Checking in and catching up

It’s been a long time since I’ve posted on this site. I apologize, slightly, for the silence. I will say, though, that almost the only folks who comment on this blog these days are spammers: someone wanting to sell me something (most commonly male organ...

Why is breathing so complex?

“What makes human breathing so complex?” This question showed up recently in my email box. I’m a volunteer responder on the website, Quora, an online question-answer site (of somewhat uneven quality). As a retired biomedical scientist, sharing...