The ability to move with speed, precision and power is important for longevity. Here’s how to gauge it and how to improve.
Winter is a busy time at bird feeders—here’s what ornithologists recommend to attract the widest variety of birds.
Forget hunting for a tape measure or a protractor. Use your Android phone camera and sensors to handle different types of measurements easily.
Discover how the diving bell spider constructs a silk platform underwater and uses it to trap air and make a diving bell.
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