Eggs contain calcium carbonate, which is what forms the protective shell around them.

In the past few years, many rivers have been reported to change colour.

In many cultures, people believe that god lives in everything around us—in plants, clothes, homes,

Many psychological and biological processes occur in the body when we are asleep.

A disc brake uses calipers to squeeze a pair of pads against a disc to

Very often, people lose track of the amount of food they have consumed, especially when

Probiotics are live bacteria and yeasts that are good for health, especially in the digestive

Water removes the dirt, debris or bacteria on a wound.

Smartphone batteries charge when a current passes through them. Greater current and higher voltages charge

If a car runs out of coolant (the blue or green liquid that is added