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Over the last several months, YouTube has reeled from a wave of criticism. It has been accused of radicalizing young voters, blank aggravation of LGBT agreeable creators, and most chiefly not doing enough to abode toxic videos on the platform. Now it’s got a new problem: the YouTube Kids app.

Spintronics might not be the sort of word that comes up in accustomed discussions, but it has been revolutionising computer technology for years. It’s the branch of physics that involves manipulating the spin of a flow of electrons, which first accomplished consumers in the late 1990s in the form of alluring computer hard drives with several hundreds of times the accumulator accommodation of their predecessors.