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Question of the Day

What have our astronauts left behind on the surface of the Moon?

Well, there's quite an inventory. Of course, there's the American flag, left by the first visitor, Neil Armstrong. The first Apollo landing crew also left a commemorative plaque. The remains of seven unmanned lunar probes, Surveyors 1 through 7, are there, plus three lunar rovers. There are six long-term scientific stations on the Moon, which include seismometers to measure tremors in the Moon's crust and some reflectors to bounce back light beams that we send up there. The Russians left several unmanned probes and assorted lunar rovers on the Moon as well.

Last 7 Days

    Why are weather forecasters called meteorologists?

    The term meteorology has been around as long as Aristotle, which places it in about 340 B.C. The Greek philosopher wrote a book called Meteorologica, in which he discussed clouds, wind, lightning, snow, and climate changes. He called it Meteorologica because it dealt with things that fell from the sky, like meteors. The word stuck, and thus a person who forecasts the weather has come to be called a meteorologist because he or she studies things that fall from the sky.

    Where did the saying "People who live in glass houses shouldn't throw stones" come from?

    The proverb appeared in Chaucer's Troilus and Criseyde, written in 1385. Later, George Herbert modified it this way: "Whose house is of glass, must not throw stones at another." And in 1736, Benjamin Franklin wrote, "Don't throw stones at your neighbors, if your own windows are glass."

    Is it true that once a pineapple is cut, it no longer ripens?

    A pineapple stops ripening the moment it is picked. For the best flavor, a pineapple must be picked after it has ripened fully. When ripe, a pineapple has a solid sound when thumped.

    How can I prevent moss from growing on my roof?

    To discourage moss, use a sponge to apply a mixture of 5 percent household bleach and water (2 capfuls of bleach to every 1 gallon of water) to the roof.

    What is the relationship between humidity and the dew point?

    Humidity is the moisture content of the atmosphere. The temperature at which this water vapor begins to condense and form droplets of dew on cool objects near the ground is called the dew point. If the dew point is below 32 degrees F, the water vapor converts directly to frost.

    How long does a cow stay in calf? And can a cow support more than one calf? If so, how many?

    The gestation period for beef cows is 279 to 290 days and for dairy cows 262 to 300 days. In response to the second part of the question, it is not uncommon for cows to produce twins. We featured a story some years ago about a Hereford that produced quadruplets! So yes, a cow can support (we assume you mean "nurse") more than one calf.

    At high noon in the Southern Hemisphere, does the sun shine in the north or south windows of a house?

    The sun shines in the north windows.

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