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What's tasty, abundant and high in protein? Bugs! You may feel icky about munching on insects, but they feed about 2 billion people each day. They also hold promise for food security and the environment. (4:51 min.)

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Hydroelectricity can be an environmentally friendly source of energy, especially compared to fossil fuels. But it also comes with a risk of mercury poisoning.

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The elements had been listed and carefully arranged before Dmitri Mendeleev. They had even been organized by similar properties before. So why is Mendeelev's periodic table the one that has endured? (4:24 min.)

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Sleep can seem like a total waste of time. In fact, it helps boost your memory and your immune system.

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There's a saying that "it's not the volts that kills you, it's the amps" and while that's true in a way, you can't have amps without volts and skin resistance plays a big part too. (5:15 min.)

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In this winning entry for the 2014 Flame Challenge Physics Girl explains the mystery of color. How we see colour is very complicated and involves wavelength, reflection, signals and perception (3:50 min.)

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Bee venom can spread quickly through your body and attack your cells. Usually, the damage is minor and symptoms disappear within a few days. But if you’re allergic to bee stings, the reaction can be deadly.

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Have you ever looked at a lake and wondered why there was a thick layer of green scum on the water? Chances are, you were looking at an eutrophic lake.

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It’s worth taking the time to understand the nitrogen cycle, because it has many important impacts on the planet. In particular, it helps you and many other living things get the nitrogen they need to survive.

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Salt dissolves in water; oil does not. But why? (5:02 min.)

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