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Scientific American

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July/August 2026: Science history from 50, 100 and 150 ye...
Jeanna Bryner · 2026-06-16 · via Scientific American

Natural fission reactor uncovered; geometry of soap bubbles

Line drawing diagram of a woman wearing a late 1800s outfit demonstrating the invention of an umbrella supporter with the use of rods and elastic straps. Image from Scientific American archive, Vol. 35, No. 3; July 15, 1876.

1876, Umbrella Supporter: "Here is a view of a new parasol and umbrella supporter invented by Eliza M. Arnold of Houston, Texas. The contraption is fitted to its wearer with rods and elastic straps."

Scientific American, Vol. 35, No. 3; July 15, 1876

1976

Natural Fission Reactor

“In an open-pit uranium mine in the southeastern part of the Gabon Republic, near the Equator on the coast of West Africa, are the dormant remains of a natural fission reactor. Within a rich vein of uranium ore the natural reactor once ‘went critical,’ consumed a portion of its fuel and then shut down, all in Precambrian times.


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“The history of the natural reactor is an extraordinary sequence of seemingly improbable events. First, uranium from an entire watershed accumulated in concentrated local deposits, including one at a place now called Oklo. Then the conditions necessary to sustain the fission chain reaction were established. After the reactor had shut down, the evidence of its activity was preserved virtually undisturbed through the succeeding ages of geological activity. Finally, the discovery of the reactor involved an investigative tour de force worthy of the best sleuths in detective fiction.”

Geometry of Soap Bubbles

“Soap bubbles and soap films evoke a special fascination. Their shifting iridescence, their response to a puff of air, their fragility—all contribute to their charm. More captivating still is the exquisite perfection of their geometry, the absolute smoothness of their forms. What are the principles that enable soap bubbles and soap films to exist in certain geometric configurations and not in others? What are the possible shapes they can assume?

“Recently we have been able to show that three basic rules governing the geometry of soap bubbles and soap films are a mathematical consequence of a simple area-minimizing principle.”

1926

How to Get Along with People

“This is the age of diplomacy. The polished sword has been supplanted by the polished word. The terrifying growls of anger have yielded place to the soothing words of tact. A careful study of the qualities of the so-called successful man will reveal in nine cases out of 10 that his success depends not on the deep and profound something which puzzles the brains of the average man, but on the simple and more superficial something which pleases the understanding of the common folk. It is that congenial something which I have defined as ‘social intelligence,’ or the ability to get along with people; while the profound something, I define as ‘abstract intelligence,’ or the ability to deal with ideas.”

Our Point of View

“‘Garabed’ is a new word which bids fair to enter the language. A definition of it might be ‘scientific hokum in support of which political pressure is brought to bear.’ Garabed is the name Garabed T. K. Giragossian gives to his alleged ‘free energy generator’ or illimitable source of power. Eight years ago he succeeded in having Congress pass a measure agreeing to give him extraordinary privileges if he could prove his claims. For Congress to lend an ear to Giragossian’s fantastic scheme establishes a dangerous precedent. It opens the door to any charlatan who seeks to ignore the orderly process of government.”

1876

Caution about Coca Leaf

“Sir Robert Christison showed recently, before the Edinburgh Botanical Society, that diversity of opinion existed in regard to the effects of coca upon those who chew it; for, while most of them considered that it possessed wonderful powers of sustaining strength under prolonged fatigue without food, some thought its use pernicious and dangerous, others, not only innocuous, but beneficial to health.

“Sir Robert gave an account of some experiments made upon some of his students and himself, in which he had found that it was both a preventive of fatigue and a restorative of strength after severe bodily exertion, and that it had no reactionary effect upon the system. In regard to the use of coca as a medicine, he advised no one to try it until something more was known about it, or, at least, not make use of it without consulting a physician.”

Three thumbnail size images of Scientific American's July 1976, 1926 and 1876 cover.

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