Glass Facts

A cow produces around 200,000 glasses of milk in her lifetime.

When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.

When glass breaks, the cracks move faster than 3,000 miles per hour. To photograph the event, a camera must shoot at a millionth of a second!

Recycling a single glass jar saves enough energy to power a television for up to 3 hours.

A ball of glass will bounce higher than a ball made of rubber.

The purpose of the indentation at the bottom of a wine bottle is to strengthen the structure of the bottle.

When glass breaks, the cracks move faster than 3,000 miles per hour.

The weight of air in a milk glass is about the same as the weight of one aspirin tablet.

By recycling just one glass bottle, the amount of energy that is being saved is enough to light a 100 watt bulb for four hours.

A cow gives nearly 200,000 glasses of milk in her lifetime.

Special glasses exist that can enhance color perception for some people with red-green color blindness, allowing them to distinguish colors they couldn't before—though the effect varies by individual and doesn't fully replicate normal vision.