Motility, and in particular directed motility, is decisively important for host colonization, as bacteria deliberately seek to colonize an organism and conquer all niches.

~ Ludwig Maximilian from,

*shudders* The article is about stress hormones in people, and research into how bacteria are (not “may be”) using our hormones to signal when they (the bacteria, *shudder* again) should go on the offensive and move. I don’t have anything to add. This just struck me as creepy.


Core temperature

Interestingly, regardless of exercise intensity, exercising in the cold has been shown to reduce and delay the typical [human growth hormone] response to exercise, leading to the speculation that the increase in core temperature may be the more important regulator of growth hormone release.

~ Brad Pilon from,

Human growth hormone is involved in a lot of the body’s signaling, and I was instantly curious about “hacking” exercise to raise core temperature… and then I remembered all the classic “boxers training in sweat suits”—drenched in sweat! It’s right in the name of the clothing. Boxes know a lot about training, muscle and getting into shape.

But then I got completely distracted reading the Wikipedia page. First off, I remember when we didn’t know what the actual shape of molecules were. Then along came mathematical modeling, protein folding… and I think there’s even a “folding at home” project where you can “donate” your computer’s free time to help figure out how proteins fold. Anyway, Human Growth Hormone seems to be solved. It has 192 (!?!) amino acids. The thing is enormous— except it’s actually not that big as far as proteins go. And the folded shape is as important as the chemical composition of each molecule. And you begin to realize the insane complexity of proteins that have hundreds of amino acids… And then you eat food and your body needs enzymes to disassemble these huge molecules into . . . sorry. I got excited. Ahem.



“We often see it discussed in relation to attachment and social-related behaviors, including empathy and bonding,” says Lily Brown, PhD, Director of the Center for the Treatment and Study of Anxiety at the University of Pennsylvania. But it’s a lot more than a fleeting chemical high. Oxytocin is a hormone that functions as a neurotransmitter in the brain. It’s thought to be a driving force behind attraction and caregiving, and even controls key aspects of the reproductive system, childbirth, and lactation.

~ Alexandra Owens from,


I regularly have conversations with people. I am fascinated by how the privacy, exclusivity of attention, and close proximity of a good conversation works. There’s magic— deep seated, ancient, evolution-driven, psychological and biological affects—in a good conversation.

The other day, I stumbled over a post mentioning the hormone Oxytocin being produced by eye contact. I wanted to leave a link for myself, and perhaps you’d be interested too.