Today I learned:
1) If you do it right, it is possible to re-light a recently snuffed candle by lighting the candle’s smoke on fire.
2) A bit of Magic: The Gathering rules — triggered abilities are checked whenever a player is about to gain priority, but after state-based effects are checked. (It’s not every day I learn a new MtG rule).
3) …a bunch of little details about microfluidic chips. For instance, 100 micrometers is a typical maximum channel width and depth in an etched glass microfluidic chip. I also learned a few different designs for slip-chips (a slip-chip is a design where you have two etched glass microfluidic chips pressed up against each other, with reagents in separate wells. You slide them so that the various wells come into contact, which lets their contents mix and react with… whatever you need them to do.
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