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With lab grown meat we could see the advent of ethical cannibalism.
(startrek.website)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
There's also the film Soylent Green (1973), though that isn't lab-grown human tissue