Chalk is made from tiny plankton fossils.
Cloud droplets measure about 0.0008 inches across, about one-fortieth the size of a pinhead. They are so light that they float in the air.
Clouds fly higher during the day than during the night.
Continental snow cover would advance to the equator, and the oceans would eventually freeze, if there was a permanent drop in just 1.6 to 2.0 percent in energy reaching the Earth.
Cork comes from the bark of trees. Specifically, it is harvested from the cork tree, which takes more than ten years to produce one layer of cork.
Quito in Ecuador, South America, is said to have the most pleasant climate in the world. It is called the 'Land of Eternal Spring.' The temperature rarely drops below 46 degrees Fahrenheit during the night, or exceed 72 degrees Fahrenheit during the day.
Rafflesia flowers can measure 3 feet across -- the biggest flowers of any plant. They are also the smelliest flowers, reeking of rotten meat. This is a trick designed to attract flies for pollination.
In living memory, it was not until February 18, 1979 that snow fell on the Sahara. A half-hour storm in southern Algeria stopped traffic. But within a few hours, all the snow had melted.
Rattan palms found in the jungles of Southeast Asia have vinelike stems that trail along the jungle floor up to 250 feet in all directions.
In Los Angeles, discarded garments are being recycled as industrial rags and carpet underlay. Such recycling keeps clothing out of landfills, where it makes up 4 percent of the trash dumped each year.
Recycled glass uses only two-thirds the energy needed to manufacture glass from scratch. That means for every soft drink bottle that is recycled, enough energy is saved to run a television set for an hour and a half.
In November, there is a stretch of warm dry weather with a little wind and usually a bit of haze in the air. In the United States, it is called “Indian Summer.” In England, France, and Italy, it is referred to as “St. Martin’s Summer.”
In November, there is a stretch of warm dry weather with a little wind and usually a bit of haze in the air. In the United States, it is called “Indian Summer.” In England, France, and Italy, it is referred to as “St. Martin’s Summer.”
Redwood trees sometimes grow to heights of 350 feet and produce bark that is more than a foot thick. Yet they spring from a seed that is only sixteenth of an inch long.
In one day, a full-grown oak tree expels 7 tons of water through its leaves.
River in the northern hemisphere scour their right-hand banks more severely than their left-hand banks. This effect is due to the rotation of the Earth.
In one year, Americans generate enough hazardous waste to fill the New Orleans Superdome 1,500 times over.
Rosemary, oregano, thyme, and marjoram belong to the mint plant family
In the King James translation of the Bible, there are more than 1,700 references to gems and precious stones.
Roughly 25 percent of all prescription medicines in the United States are derived from plants, including alkaloids from the rosy periwinkle of Madagascar. This plant has been successful in arresting childhood leukemia and Hodgkin's disease.
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