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What smell do you love that you’re not supposed to love?
(discuss.tchncs.de)
Share a story, ask a question, or start a conversation about (almost) anything you desire. Maybe you'll make some friends in the process.
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There are a ton of them, though I've only seen about a half dozen of these. Wikipedia has a nice list of what they are and what they're used for.
There are even contests for agar art.
"The Battle of Winter and Spring," ASM's 2018 Agar Art Contest first-place winner, by Ana Tsitsishvili, Undergraduate Student, Agricultural University of Georgia, Tbilisi, Georgia.
ELI5 video how it's made