The simplest form of airplane flight is found in the glider. It uses only pockets of rising air, and the movement of air past its wings, to fly above the surface.
In places where there are water-related problems, engineering is often touted as the solution. As an example for what happens when you tinker with natural waterways, the river Rhine in Germany, often visited by Americans, stands out.
The water discussions in the Gainesville and Atlanta areas often bring up the term "drainage basin," which is the same thing as a "watershed."
With so many changes going on in our natural environment, you may be wondering what to expect in the months ahead. An earthquake in Guatemala 10 days ago killed 48, and another severe one happened in Myanmar last Sunday.
It gets dark an hour earlier now than it did last month. As we head for the shortest days of the year, outdoor and indoor lighting are very important.
It's rare for a hurricane like Sandy to bypass most of the East Coast and then enter the continent that far north.
Fall is the season for enjoying colors in North Georgia. But it's not just the colors of tree leaves that are changing. The sky shows a much greater variety of hues than we get at other times of the year.
In this country, the automobile is the most common form of transportation. You don't need to go far to observe the problems that come with it.
Sunshine. Then more than 6 inches of rain, setting an all-time record for Gainesville. Then sunshine again.
When you look at the most common type of air conditioning system used in homes, you see a conspicuous part of it outside. That's the condenser. Its job is to take the heat delivered to it from inside the house, and vent it off into the atmosphere.
Phoenix, Ariz., is a fascinating city. Completely surrounded by some of the driest, hottest desert in America, it's a flourishing trade and convention center.
Sub-Saharan Africa appears in the news regularly with reports of human losses and suffering. This month, flooding hit the northern part of Nigeria hard. The Kano and Wudil rivers flow at the southern edge of the Sahara Desert, providing fertile agricultural land with their water and sediment.
In Haiti, wrecking crews tore down the Presidential Palace last week. The ornate building was a reminder of the devastating earthquake that struck the nation, located on the Caribbean island of Hispaniola, almost three years ago.
Weather pounds on the roof, gets us soaked, and makes the lakes rise. But it also modifies the landscapes around us.
The "futurology" movement of the 1960s, which promised progress and prosperity, based almost entirely on technology, has long ebbed away. Science fiction literature and movies range from the realistic to the ridiculous.
While much of the northern and eastern U.S. shivered in frigid weather, parts of England experienced severe storms. Recent research suggests that these record-setting events were due to warming of the Arctic.
An earthquake in South Dakota two weeks ago. Another in South Carolina last week. It would be tempting to come up with scary headlines now.
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