I wonder if we'll look at pre-2020 data as an equivalent of "low-background steel"[0] [0]: https://en.wikipedia.org/wiki/Low-background_steel https://en.wikipe

I wonder if we'll look at pre-2020 data as an equivalent of "low-background steel"[0] [0]: https://en.wikipedia.org/wiki/Low-background_steel https://en.wikipedia.org/wiki/Low-background_steel