From a telescope network that spans much of the globe to a psychology study that spans 67 countries, here are the biggest ...

In 1942, Sigmund Rascher and others conducted high-altitude experiments on prisoners at Dachau. Eager to find out how best to save German pilots forced to eject at high altitude, they placed ...

The spring constant of a spring can be found by carrying out an experiment. The unloaded length of a spring is measured. Slotted masses are added to the spring. Record each stretching force in N ...