The internet is full of videos of thoughtful people setting things on fire. Here’s a perennial favorite: Cleave a grape in half, leaving a little skin connecting the two hemispheres. Blitz it in the microwave for five seconds. For one glorious moment, the grape halves will produce a fireball unfit for domestic life. Physicist Stephen Bosi tried the experiment back in 2011 for the YouTube channel Veritasium, in the physics department’s break room at the University of Sydney.

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