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Satellite view

Photo of the dam

A Canadian ecologist has discovered the world’s largest beaver dam in a remote area of northern Alberta, an animal-made structure so large it is visible from space.

Researcher Jean Thie said Wednesday he used satellite imagery and Google Earth software to locate the dam, which is about 850 metres (2,800 feet) long on the southern edge of Wood Buffalo National Park.

Read the rest on AFP

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Tears have several important functions. In all land animals, they clean and lubricate the eyes. And in some places, they are also a source of nutrition. A German scientist has discovered that a moth on the island of Madagascar drinks the tears of sleeping birds.

The moth (Hemiceratoides hieroglyphica) is about 2.5 centimeters (1 inch) long and has a proboscis about half that length. A proboscis is a tubelike structure that moths and butterflies use like a drinking straw to sip nectar and other liquids. The Madagascar moth uses its proboscis to suck tears.

Source: Current Science, a Weekly Reader publication, March 16, 2007

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www.youtube.com/watch?v=wupToqz1e2g

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NASA Earth Image of the Day

NASA Earth Image of the Day

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