Chris Thompson’s attic contained a treasure trove of rare gems and minerals, safely tucked away and incased in bubble wrap.

The bubbles weren’t moving consistently, so he replaced the water with mineral oil. Oil made a huge improvement, but the bubbles still float up at different speeds. [Matt] ascribes this to the ...

These rise to the top with the attached air bubbles and form a froth layer that can be skimmed off. Mineral particles have ...

President Donald Trump is invoking emergency powers to boost the ability of the US to produce critical minerals — and ...