How We're Redefining the kg

Veritasium (Derick, who I've met personally) does a fantastic job on these fundamental science subjects. Le Grande K was the definition of the kilogram. Derick explains the question at hand, how Plancks constant is now used. Derick's quality is supreme & he is always very careful and confident about claims. ▶ this video

There's also an excellent video from Veritasium, a science and education YouTube channel, about what's being done to define the kilogram ▶ this video

> Does anyone have an example of where a change like this would be important? Well, it's important today, because the reference samples used across the world have drifted apart, and not in a consistent fashion. Which raises the question of whether the exemplar kg has drifted as well. So, we don't really know if the kg we're using today is the same kg we were using 10 years ago. Given how important mass is to many scientific calculations, a drifting standard could directly impact all the other work we do. I found the Veritasium video to be a bit more interesting for the "why" aspect of this change: ▶ this video