Cool scientific toy in our store: neodymium-iron-boron magnetic spheres to model atomic interactions at human scale https://store.boingboing.net/sales/nanodots-216-original-2?utm_source=boingboing.net&utm_medium=referral&utm_campaign=nanodots-216-original-2_050817&utm_term=scsf-229805 …pic.twitter.com/XRQjn7HUaz
9:14 PM - 23 May 2017
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