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Balloons from kids’ birthday parties often hang around for weeks. But the helium balloon is often on the floor, largely deflated, by the next morning. Balloons are made fr
An animal with a bill like a duck, a tail like a beaver, and feet like an otter sounds like something a mad scientist would create. Add to the list the ability to lay lizard-like e
Money is used to pay for various goods and services. It is also used to measure and store value. Money usually takes the form of coins, banknotes and bank balances. There are a num
Typically, fire comes from a chemical reaction between oxygen in the atmosphere and some sort of fuel (wood or gasoline, for example). Of course, wood and gasoline don’t spontane
Observational science is theoretical, experimental and applied research related to oceanic, atmospheric, and terrestrial sciences. The ultimate goal of observational science is a b
A spring is a component of the hydrosphere. Specifically, it is any natural situation where water flows to the surface of the earth from underground. Thus, a spring is a site where
Have you ever wondered why heavy steel ships float and don’t sink? Plain steel would sink in water immediately, as would a wrecked steel ship like the Titanic or the more recentl
Glaciers are flowing masses of ice, created by years of snowfall and cold temperatures. Approximately one-tenth of Earth is covered by glaciers, including Antarctica and parts of G
The universe, totality of matter and energy in existence. The study of the origin of the universe, or cosmos, is known as cosmogony, and that of its structure and evolution, cosmol
The Egyptian Pyramids are colossal structures used by the ancient world for religious purposes. The largest and most remarkable of the pyramids occur in several groups on the