INTERESTING FACTS

Why is the sky blue in the day and black at night?

During the day (daylight) the sky has a blue appearance because the Sun’s light (white light) is made up of rainbow of colors (red, orange, yellow, green, blue, indigo and violet) of different wavelength....

What is the difference between an ocean and a sea?

Ocean and sea are two words that are used frequently and interchangeably (in writing and conversation) to mean the same thing: a continuous mass of seawater on the earth's surface. However, strictly speaking,...
popcorn kernel

Why Does Popcorn Pop?

A popcorn kernel is a cereal grain (seed). It is made up of four major physical structures: (1) The Pericarp (seed coat or outer hull): a hard outer thin covering. (2) TheEndosperm: starchy part that form...
why_burp

Why do people burp?

A burp (sometimes called a belch or by its medical term, eructation) is the release of gas from the digestive tract (in this case, theesophagus and stomach) through the mouth. It is part of the body natural c...

What is the Policy of Containment?

This is a foreign policy strategy created and executed by the US after WWII founding it's first key purpose in the Truman Doctrine of 1947. President Harry Truman warned of the evils of communism that threate...
why is space black

Why is space black?

Where there is no light then there is darkness. This means that a surrounding without light would be black in color. Our experience here on Earth (one common example, night and day) tells us that the color blac...