If you have a spare hour to kill this is a very interesting video on rare earths https://www.youtube.com/watch?v=88jpgxSRVZU
Interesting China has been working on them since 1950 and at 26 minutes he talks about the magnetic fridge door inventor which I applaud as a few poor kids died with the old doors.
Rare earths
Moderator: busrider
Rare earths
Parrahub, an extra option in the public transport menu http://www.parrahub.org.au/