How+do+you+know+that?

engineering everywhere
 * basis for knowing what we know
 * science - tools to facilitate discover, expanding knowledge, understanding - collaboration, leapfrog


 * NASA - mostly engineering, applied science

need both science (nature) and engineering (man-made) to move forward / deeper. sometimes have to wait for one to catch-up
 * observe planets, stars - telescope to "see" finer details
 * microscopes to "see" germs
 * measurement - time - clocks, speed - radar, weight - balance, scales