Uncategorized
- Chemistry
Powerful explosive blasts onto scene
Researchers have synthesized what could be the most powerful nonnuclear explosive known.
- Animals
Butterfly ears suggest a bat influence
Researchers have found the first bat-detecting ear in a butterfly and suggest that the threat of bats triggered the evolution of some moths into butterflies.
- Astronomy
Hubble Space Telescope: Eye wide open
Two months after the failure of a fourth gyroscope shut it down, and 3 weeks after a shuttle crew paid it a service call, the Hubble Space Telescope is back in business.
- Earth
As globe warms, atmosphere keeps its cool
Scientists confirm a confusing discrepancy between temperatures at Earth's surface and in its atmosphere.
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19080
This article fails to point out interesting aspects of the land and ocean temperature data shown in the article. During the period from about 1918 until 1943, land and ocean temperatures rose at a rate of about 18C per millennium. From 1943 until about 1975, the temperature was constant or declined slightly. A period of […]
- Health & Medicine
Oxygen limits infections from surgery
Giving patients extra oxygen during and shortly after colorectal surgery halves the incidence of infection.
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19079
It’s always risky to assert that a particular study has never been conducted. The research may have been done and, worse, the researcher may come across the assertion. This article claims, “Long-term studies of tough boys have yet to be conducted.” In 1987, we reported a 9-year follow-up of 25 boys (Contributions to Human Development […]
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Popular Boys Show Their Tough Side
Some highly aggressive boys may become popular figures in their elementary school classes and wield much influence over classroom discipline.
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From the January 18, 1930, issue
HUGE SHOVEL CAN LIFT CAR OF COAL The largest shovel in the world, with a scoop big enough to pick up an automobile, is the subject of our cover illustration. It is in use at the Fidelity mine of the United Electric Coal Co., near DuQuon, Ill., the greatest coal-stripping enterprise in the world. Electrically […]
- Computing
Scouring the Web
Looking for the perfect Web search engine? It probably doesn’t exist, but you can find out the strengths, weaknesses, and quirks of various Net-scouring tools at the “Search Engine Showdown” Web site, maintained by Montana State University librarian Greg R. Notess. Check out the inconsistencies report and sample tips for efficient searching. Go to: http://www.notess.com/search/
- Math
Turn of the Screw
“What we are told about Archimedes is a mix of a few hard facts and many legends,” Sherman Stein of the University of California, Davis notes in his book Archimedes: What Did He Do Besides Cry Eureka? A three-bladed Archimedes screw. Courtesy of Chris Rorres. I was reminded of that statement when my son Kenneth […]
- Math
Conquering Catalan’s Conjecture
Innocent-looking problems involving whole numbers can stymie even the most astute mathematicians. As in the case of Fermats last theorem, centuries of effort may go into proving such tantalizing, deceptively simple conjectures in number theory. Now, Preda Mihailescu of the University of Paderborn in Germany finally may have the key to a venerable problem known […]
