For many, winter might be the perfect time of year to sit around, reading, sipping tea, and eating home cooked foods. For others, the cold weather is ideal for being active. Over the last five years, ...

Erwin Perzy I, a surgical instruments mechanic in Vienna, was experimenting with a water-filled glass globe around 1900 to amplify light when added particles drifted down like snow. The "snowfall" ...