It’s the grand finale! Our last four greatest science ideas of the past 25 years include a very hungry super fungus, a chemical-free (but not dubstep-free) insect repellent, a poignant story of agricultural polymers and wet books, and a cure for sleep apnea that may require some negotiations with your neighbors.

We’re giving away great prizes every day this week! Head over to our Instagram @parttimegenius to find out how you can win.

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25 Greatest Science Ideas Countdown: Day 5