A site once used as an observatory by the Anasazi, ancient pueblo dwellers of New Mexico, has been recently discovered where patterns of light and shadow were employed to establish the precise limits of the positions of the Sun and Moon over a nineteen-year cycle.

Plausible though it sounds, the weakness of the hypothesis is that it does not incorporate all relevant evidence.

Because 70 percent of the people of India use wood as their sole fuel, ten million acres of forest have been lost there since 1960, resulting in wood now costing eight times as much to collect and distribute than in 1960.

Chinese public buildings erected under a construction code of the Sung dynasty have withstood earthquakes well because the white cedar used has four times the tensile strength of steel and the timber frame, incorporating many joints and few nails, is flexible.

Remembered almost as an epic among America’s 12,000 Bosnian Muslims is the digging of Chicago’s subway tunnels in the early 1900s, one of the proudest of family legends.

 Avalanches at Rogers Pass in Glacier National Park killed more than 200 people between 1885 and 1910, but they are now controlled if not prevented; cannons are fired at the slopes to make snow masses fall before they become dangerous.

When adjusted for body weight, children of various age groups in the United States have a caffeine intake that ranges from 36 to 58 percent of the average amount consumed by adults.

Many of them chiseled from solid rock centuries ago, the mountainous regions of northern Ethiopia are dotted with hundreds of monasteries.

Because there is not a linguistic census in France, as there is for Britain, there is difficulty in estimating the number of speakers of Breton, a Celtic language.

Although many art patrons can readily differentiate a good debenture from an undesirable one, they are much less expert in distinguishing good paintings and poor ones, authentic art and fakes.