Did you know that around 20% of kids missed school last year because of back pain caused by backpacks?
Maybe mom wasn't right after all when she told you to "sit up straight!"
“Spandrel” is a term from architecture. Imagine a dome that is held up by four arches, the way it’s done in cathedrals. When you do this you wind up with some leftover space between each arch. That’s a spandrel.
This means that the water pumping in and out of them also provides them with nutrients and enables them to eliminate waste products. If you’ve ever wished you were just a little bit taller, try measuring your height in the morning. It might make all the difference.