We've gotten less snow in the Hudson Valley in recent years, but when it does snow, every time it snows, the question swirls before the flakes stop falling: "How much did we get?" Believe it or not, ...

How accurate you need to be when you measure depends on the situation. To measure and draw well, you need to know how to use a ruler and understand the different units of measurement, such as ...

Measuring cosmological distances is tricky at the best of times, but it is even harder if your ruler isn’t up to scratch. A new cosmological standard ruler could make the difference – and help ...