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The Wilkinson Microwave Anisotropy Probe (WMAP)

The cosmic microwave background (CMB) radiation is the radiant heat left over from the Big Bang. It was first observed in 1965 by Arno Penzias and Robert Wilson at the Bell Telephone Laboratories in Murray Hill, New Jersey. The properties of the radiation contain a wealth of information about physical conditions in the early universe and a great ...

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WilkinsonMicrowaveAnisotropyProbe
Physics

Galileo Thermometers

Every substance has the property of 'mass', which is the basic physical presence of matter. Matter occupies space. A physical mass contained within a physical space produces the physical property of ... Continue reading

GalileoThermometers
Astronomy

Galaxy Cluster RDCS 1252.9-2927

A color composite image of the galaxy cluster RDCS 1252.9-2927 shows the X-ray (purple) light from 70-million-degree Celsius gas in the cluster, and the optical (red, yellow and green) light from the ... Continue reading

GalaxyClusterRDCS125292927
Astronomy

Live Fast, Blow Hard, and Die Young

Massive stars lead short, yet spectacular lives. And, they usually do not go quietly, instead often blowing themselves apart in supernova explosions. Astronomers are curious about the details of the ... Continue reading

LiveFastBlowHardDieYoung
Geology

Weathering, Erosion, and Deposition

Weathering, erosion, and deposition are processes continually at work on or near earth's surface. Over time, these processes result in the formation of sedimentary rocks. Weathering occurs when rocks ... Continue reading

WeatheringErosionDeposition

Tea Time!

TeaTimeDid you know that a disease of coffee plantations made the British tea drinkers? In the 1700s Britain had many coffeehouses that served as popular social gathering places to discuss current events and conduct business. For example, the famous insurance company 'Lloyds of London' was started by patrons of Edward Lloyd's coffeehouse about 1774. These coffeehouses obtained their coffee from plantations in Ceylon (now known as Sri Lanka), the leading coffee exporter of the time. About 1870 a serious disease, coffee rust, struck these plantations and in 10 years had destroyed half of the coffee production. As a result of this disease former coffee plantations were replanted with more than a half-billion tea bushes.

A pound of tea yields 10 times as many cups of the brew as a pound of coffee, making tea much less expensive than coffee and allowing the lower classes to enjoy a stimulating beverage. So tea became a great leveler of British society.

Although rust-resistant coffee varieties have been developed, races of rust occur that overcome this resistance, and the disease continues to be a problem. Strict quarantines are enforced in coffee growing regions of the world, especially in Central America, in an attempt to prevent the establishment of rust in their coffee plantations.