Wes Phillips

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The Physics of Medieval Archery

Gareth Rees calculates that the British archers at Agincourt might have rained 50,000 arrows a minute for a solid eight minutes onto the French. So if you were snorting derisively at the title's combination of "medieval" and "physics," consider this: Agincourt was, essentially, the first battle where conventional cavalry tactics met the equivalent of the machine gun.

The Quarter-Mile Test

Dr. Anne Newman suggests that a simple test—the ability to briskly walk a quarter of a mile—might be an "important determinant" not only of whether an elderly subject might be alive in six years, but of the illness or disability he or she might experience during that time. Yes, it's a small sample, but I'm going to keep walking.

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