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Predicting Floods

Several types of data can be collected to assist hydrologists predict when and where floods might occur. The first and most important is monitoring the amount of rainfall occurring on a realtime (actual) basis. Second, monitoring the rate of change in river stage on a realtime basis can help indicate the severity and immediacy of the threat. Third, ...

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PredictingFloods
Geology

Arctic Carbon a Potential Wild Card in Climate Change Scenarios

The Arctic Ocean receives about 10 percent of Earth's river water and with it some 25 teragrams [28 million tons] per year of dissolved organic carbon that had been held in far northern bogs and other ... Continue reading

ArcticCarbon
Biology

New Ideas About An Old Puzzle

There's a familiar way of talking about language as a 'tool,' but of course that's just a metaphor. Literal tools made of rock can last for millennia as evidence of the skills of early humans. Not so ... Continue reading

NewIdeasAboutAnOldPuzzle
Medicine

What is Herd Immunity?

No vaccine is 100% effective and usually does not work in 5% of those immunized. In addition, another 5% lose immunity after time. That means that, even after you are immunized, you could contract the ... Continue reading

WhatisHerdImmunity
Biology

The Strange Case Of Phineas Gage

Long before the advent of neuroscience, brain injuries have been used to deduce how the brain is organized into separate regions handling separate tasks. Consider the case of Phineas Gage, a ... Continue reading

PhineasGage

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.