The Constants They Are A Changin': NIST Posts Latest Adjustments to Fundamental Figures The electromagnetic force has gotten a little stronger, gravity a little weaker, and the size of the smallest "quantum" of energy is now known a little better. The National Institute of Standards and Technology (NIST) has posted* the latest internationally recommended values of the fundamental constants of nature. Credit: Mohr,Talbott/NIST View hi-resolution image The constants, which range from relatively famous (the speed of light) to the fairly obscure (Wien frequency displacement law constant) are adjusted every four years in response to the latest scientific measurements and advances....