The purpose of magic has changed since temple priests in ancient times used mechanical devices to make wine pour from statues' mouths and doors open with the sound of thunder. Entertainers in the Middle Ages would try other techniques such as sleight of hand to mystify the crowds as they traveled from city to city.
Whether it's filled with mossy rocks and ferns or sands and cactus, a terrarium is an amazingly fun way to learn more about nature. With a terrarium in your room, something of the outdoors can always be inside.
Terrariums that feature plants (not animals!) lock water inside to keep the soil moist. When the plants transpire, they let out water vapor. When the soil gets warm, it lets out water vapor. All this vapor collects against the top and falls back as rain.
That wascally wabbit was a smart guy. Carrots, along with other orange and green fruits and vegetables, are good for the eyes! They're packed with vitamin A. People who don't get enough of this vitamin can develop severe vision problems, but a rabbit or a person who gets plenty of vitamin A will know that she's doing all she can to make her vision healthy.
What do the Earth, electric motors, and your computer all have in common?
These things are all influenced by magnets.
The Earth has a liquid metal core that acts like a bar magnet. It gets its magnetism from being near electrical currents beneath the surface. Because the Earth is not perfectly shaped, every so often the direction of the field will change. Scientists have found evidence that this has occurred at least 171 times over the past 71 million years. How do they know that? Magnets!
There is not such a cradle of democracy upon the earth as the Free Public Library, this republic of letters, where neither rank, office, nor wealth receives the slightest consideration.
