ScienceIQ.com

A Undersea View of Our Earth's Geography

The ocean bottom is divided into three major areas: the continental shelf, the continental slope, and the deep ocean basin. The continental shelf extends underwater from each of the major land masses and can best be characterized as the submerged portion of the continents. The shelf has features similar to those we see on land, including hills, ...

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UnderseaEarthsGeography
Biology

Cloning and Ethics

Cloning technology today is far from perfect: it requires many attempts and only 1%, if any, of the cloned eggs become embryos and then survive. For example, the first cloned sheep, Dolly, was ... Continue reading

CloningandEthics
Biology

GM: Not For General Motors Anymore

Genetically Modified plants have been given genes from other plants or even other species, that make them better able to resist diseases and pests, or more nutritious, or more productive. The list of ... Continue reading

GMNotForGeneralMotorsAnymore
Biology

Are Bees Physicists?

Far-reaching research, and research that promises to join mathematics and biology, has been conducted by a mathematician at the University of Rochester, Barbara Shipman. She has described all the ... Continue reading

BeesPhysics
Biology

What Causes Wrinkles?

Elastin and collagen are proteins in the skin's underlying layers that give it firmness and elasticity. As we age, skin begins to lose its elastin fibers. The fibers start to tangle in disorganized ... Continue reading

WhatCausesWrinkles

Mother Nature's Own Brand of Bioterror

BioterrorWe've been hearing a lot about smallpox lately, as a possible bioterror attack. But Mother Nature has her own brand of bioterror. Smallpox has been with us for about ten thousand years, since the earliest agricultural settlements in Africa. From there it spread to Egypt and on into Europe and Asia. Smallpox victims have a high fever, ache all over, and get a terrible rash that usually leaves disfiguring scars. Often the rash spreads to the eyes, leading to blindness. As many as half of the victims die.

Pharoah Ramses V of Egypt appears to have died of smallpox, as his well-preserved mummy shows the characteristic scarring. The Greek historian Thucydides noted that people who survived smallpox were later immune to it (but the Greeks did not invent vaccination). Epidemics of smallpox hastened the decline of the Roman empire.

But the most catastrophic smallpox epidemics befell the natives of the New World, for smallpox had not reached the Western Hermisphere until the Europeans brought it in the 15th century. The native americans, having no experience with it, had no resistance and died by the thousands. Since none of them had ever had it before, nobody was immune, and everybody in the community got sick. It is thought that as many as 90% of the native american population died of European diseases, including smallpox.