 is change. So you don't have time like we know it, where time is like moving forward all the time and this little oscillator that is a molecule is, you know, the atomic clock that tells us when time is moving. But time is all relative. If you take that atomic clock and raise it a foot off the ground, it runs at a different rate because gravity, you know, it's so sensitive they can tell the difference between the atomic clock on the ground versus a foot above the ground or a meter above the ground.