Mar 17, 2015
new kids book idea: body factory all about osmosis, blood delivery, trace amounts, and excretion vs keeping it in the body. why are some things not excreted? is it because the substance is so unnatural that the body is unable to excrete it by or because the mineral is so rare and benign that no evolutionary pressure has been placed on an excretion mechanism? I guess these could overlap? either way it sounds like I need to do some research before I try to write anything about it!