Where Does Saliva Come from?
Saliva enters the mouth from three pairs of glands around and under the tongue. The glands that make it are called salivary glands. The salivary glands sit inside each...
Read More
Why Are Pounds Abbreviated Lbs?
Why Are Pounds Abbreviated Lbs? The English “pound” comes from the old Latin word “pondo,” meaning “pound” as weight. The ancient Romans developed the pound as a...
Read More
What Is Paint Made of?
Paint is made of pigments, solvents, resins, and various other additives. The pigments give it color; solvents make it easier to apply; resins help it dry; and...
Read More
How Are Seedless Orange Trees Started?
How Are Seedless Orange Trees Started? New seedless orange trees are started by grafting buds from fully grown seedless orange trees to rooted seedlings that were grown...
Read More
How Did the Adam’s Apple Get Its Name?
How Did the Adam’s Apple Get Its Name? “Adam’s apple” gets its name from the belief that a piece of the apple (or forbidden fruit) which Eve gave to Adam, stuck in his...
Read More
What Are the Dragons of Komodo?
What Are the Dragons of Komodo? The dragons of Komodo are the world’s largest lizards. They inhabit the remote Indonesian island of Komodo, and look very much like...
Read More
Can Cats See Colors?
Can Cats See Colors? A cat’s vision is similar to a human who is color blind. Cats have a type of color blindness that some humans have, called deuteranopia. They...
Read More
What Causes an Itch?
What Causes an Itch? An itch occurs when something irritates the skin. If the irritation is strong enough, it could be painful. If the irritation is slight, you’ll...
Read More
Are Sloth’s Really Lazy?
Are Sloth’s Really Lazy? In the 1600’s, scientists began to use “sloth” as a name for arboreal (tree-dwelling) mammals in the jungles of Central America and South...
Read More
Why Does a Cow Chew Its Cud?
Why Does a Cow Chew Its Cud? Chewing a cud is the way a cow digests its food thoroughly. A cow has a special stomach with a storage section called a “rumen.” When the...
Read More