Paleomagnetic dating —
matching magnetic properties in the sediments surrounding a fossil or artifact to ancient reversals in the Earth's magnetic poles to determine age — later determined the tools had to have been made 3.3 million years ago.
Not exact matches
The unique structure translates to thermal, electrical and
magnetic properties no other material can
match, and the commercial applications are almost limitless.
But physicists often carry out their calculations in terms of momentum space (also called reciprocal space) rather than ordinary three - dimensional space, Lu explains, and in that framework
magnetic monopoles can exist — and their
properties match those of Weyl points.