Your body produces it when your skin is in the sun or when you eat vitamin-D-rich foods. It can be hard to notice a vitamin D deficiency because it sometimes yields no symptoms. One study found ...

Managed honey bees have the potential to affect native bee populations when they are introduced to a new area, but a study led by researchers at Penn State suggests that under certain conditions ...

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And both uphill and downhill training can improve your proprioception — or your sense of where your body is in space — which can reduce your risk of falls. Start by charging uphill while ...