The body has mechanisms to alter or maintain blood pressure and blood flow. There are sensors that sense blood pressure in the walls of the arteries... My WebMD Sign In, Sign Up
Perhaps while we're not watching, the denizens of Dark Shadows carry-on, caught in another inter-dimensional wing of Collinwood. If you peer out the corner of your eye, you may catch a glimmer of this shadowy activity, perhaps in Dark Shadows Collection 14, or Dark Shadows Collection 22.
What Is The Speed Of Dark? The speed of light zips along at 299,792,458 m/s. But what about the speed of dark? Dark is really just the absence of photons, but dark shadows can appear to have some pretty amazing properties. Check out this Vsauce video that explores the speed of light, shadows, stages of twilight, the rate of collecting knowledge versus realizing the depths of our ignorance, and more: