Why does aluminum foil hurt your teeth?

Why does aluminum foil hurt your teeth?

Biting on aluminum foil can be painful and is usually noticed if you have metal in your mouth from dental work (e.g. fillings, crowns). Basically, when you bite on foil, you set up a battery in your mouth and the electrical current stimulates nerve endings in your tooth.

What does it mean when cows lay down?

For researchers have discovered that cows stand up for longer periods when it is hot — proving there is a definite link between their behaviour and the weather — because it also suggests they lie down when it is colder, which is often what happens to the weather just before it rains.

Why is it called a tom boy?

Since “Tom” was a name for the common or archetypal male, a particularly rowdy boy was perhaps called a “Tom boy” as another way of saying he was especially boyish – a boy’s boy, in other words. “Tomboy” soon took on another meaning, according to the OED, that of “a bold or immodest woman.”

Whose sperm is longer; a mouse or an elephant?

Longer sperm often seem to have a competitive advantage. However, a study now reveals that the size of the animals also matters. The larger the animal, the more important the number of sperm is relative to sperm length. That’s why elephants have smaller sperm than mice.

Which animal’s eye is bigger than its brain?

Ostrich has the biggest eyes in the whole animal kingdom. Its eye is bigger than its brain. Ostriches don’t hide their head in the sand. They will lay their head on the ground if they sense a danger.

Why do they call it a soft drink?

soft drink. So called in contrast to alcoholic beverages, which are “hard drinks”. Any carbonated, usually sweet, non-alcoholic drink. (In this sense, juice, milk, tea and coffee are not soft drinks.)

How many spaces do you put after a period?

When using a monospaced font, where everything is the same width, it makes sense to type two spaces after a period at the end of a sentence to create a visual break. For that reason, people who learned to type on a typewriter were taught to put two spaces after a period at the end of a sentence.

What is the use of the sphygmomanometer?

A sphygmomanometer is the gauge used to measure blood pressure. The sphygmomanometer reads both systolic and diastolic pressure. A doctor takes these measurements by putting on the cuff and pumping it up, which cuts off the blood flow.