This list has the usual variety of design/technological ideas (artificial engine noise for electric cars, artificial guilt for battlefield robots, a kitchen sink that puts out fires by filling the air with a fine mist, the glow-in-the-dark dog), environmental interventions/observations (artificial carbon-absorbing trees, a way of more efficiently disposing of corpses, bans on suburban culs-de-sac, pessimistic variants on the Gaia hypothesis), psychology and the social sciences (lithium in the water supply reduces suicide rates, randomly promoting employees works best, being given "counterfeit" goods to wear can increase one's likelihood of cheating), geopolitics (promoting communication in itself to undermine dictatorships) and business (subscription models for funding art). Where last year's had a recurring theme of trying to fix a dysfunctional capitalism, this year's theme seems to be zombies (both in the context of Jane Austen mashups and finding scientific models of how to survive a zombie epidemic; the answer, for what it's worth, is strike back hard and annihilate them before it's too late).
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