On This Day, Feb. 24: Scientists announce oldest-known fragment from Earth's crust
On Feb. 24, 2014, scientists announced that a tiny zircon crystal from Australia, 4.4 billion years old, was confirmed to be ...
Australian Broadcasting Corporation14m
Trump wants half of Ukraine's rare earth minerals — so what are they and why does he want them?
The US lists 50 elements as critical minerals, according to the US Geological Survey (USGS). A subcategory of critical minerals is rare earth elements (REE). These are elements essential for mobile ...