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Storing Sunshine Using Flow Batteries

Flow batteries are a unique kind of battery — they have tanks that hold hundreds of gallons of the chemicals, called electrolytes. Flow batteries just happen to be very good at storing solar or wind power. Renewable power sources suffer from being intermittent, and less reliable for continuous power supply than coal or gas. Neither resource is a good match …

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Yaktrax Ice and Snow Shoe Grips

Here’s something that allows you to get traction on snow or ice while wearing your regular shoes. These Yaktrax grips are essentially a thick rubber bands, equipped with steel coils, that fit over the sole of your shoes. Apparently the idea was borrowed from the Tibetans. Priced around $20 per pair, available from Amazon.