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Sex and the Sea Slug

The sea slug, Aplysia. Now there's an expert on sex. Equipped with both male and female sex organs, this shell-less, subtidal mollusk lives alone most of the year. It loses its self-sufficiency, however, when the mating season comes around. In summer, sea slugs congregate in breeding colonies called (yes, it's true!) brothels. They crawl around and ...

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SexSeaSlug
Medicine

SARS: Mother Nature Strikes Again!

SARS, short for Severe Acute Respiratory Syndrome, is big news this spring. By the middle of April 2003, over 2000 people had been diagnosed with it in China and Hong Kong, another few hundred in the ... Continue reading

SARSMotherNatureStrikesAgain
Biology

The Rapid Movement of the Soybean Rust Pathogen

Soybean rust, caused by the fungus Phakopsora pachyrhizi, results in soybean yield losses of up to 80%. Rust diseases are named for the orange powdery spores produced in leaf pustules. They are easily ... Continue reading

SoybeanRustPathogen
Chemistry

Oil Viscosity

Everybody recognizes 'oil' as a word for liquid materials that do not behave like water. They have a 'thickness' and self-cohesive character (autocohesion) that enables them to form a film on a ... Continue reading

OilViscosity
Geology

The Importance Of Clouds And Aerosols To Climate Change

Everything, from an individual person to Earth as a whole, emits energy. Scientists refer to this energy as radiation. As Earth absorbs incoming sunlight, it warms up. The planet must emit some of ... Continue reading

CloudsAerosols

Smallpox, Chickenpox . . . Monkeypox?

SmallpoxChickenpoxMonkeypoxThis past summer a few people in the midwest came down with monkeypox, a viral disease related to smallpox but less infectious and a lot less deadly to humans. Oddly they all seem to have caught the disease from domesticated prairie dogs, which have become increasingly popular as pets. Like chickenpox, monkeypox causes fever, swollen lymph nodes, and a rash. Like smallpox and chickenpox, the spots can leave scars. Most people recover from monkeypox, but it is occasionally deadly.

Monkeypox is not usually found in North America. It is normally found in the rainforests of Africa, where it infects squirrels, rodents (and of course monkeys). It is assumed that the Wisconsin prairie dogs caught it at the pet store from exotic pets imported from Africa, possibly giant gambian rats (yes, some people consider these pets).

To prevent the virus from entering the wild rodent population in this country, the Centers for Disease Control banned the importation of rodents from Africa and set out strict guidelines for handling and quarantining suspected cases in pets. By the end of July there had been 37 confirmed monkeypox cases in humans, but there have been no more cases in this country since then.