Uncategorized
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19391
The article about tuberculosis states that Robert Koch in 1882 was the first person to link a particular microbe to a disease. References indicate that Armauer Hansen demonstrated in 1868 that Mycobacterium leprae was associated with the tissues of leprosy patients. He may not have had Koch’s postulates to prove this linkage, but many credit […]
- Math
Mapping Scientific Frontiers
Can computer visualization help identify turning points and milestones in scientific discovery?
- Humans
Letters from the March 13, 2004, issue of Science News
Dry hole? “Tapping sun’s light and heat to make hydrogen” (SN: 1/17/04, p. 46: Tapping sun’s light and heat to make hydrogen) seems to be delivering good news for the environment: “Clean” hydrogen can be produced from water using solar energy. This seems to me, however, to be even more horrifying than the burning of […]
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19390
I believe a reader rushed to judgment regarding the environmental impact of splitting water to produce hydrogen for fuel (“Letters: Dry Hole?” above). The split water isn’t ultimately consumed, only recycled. Burning hydrogen reunites it with oxygen, returning water to the environment. Much more intriguing questions might concern the human-accelerated migration of water from liquid […]
- Humans
From the March 10, 1934, issue
High-speed photography, artificial radioactivity, and earthquake prediction.
- Animals
New Green Eyes: First butterfly that’s genetically modified
Scientists have genetically engineered a butterfly for the first time, putting a jellyfish protein into a tropical African species so that its eyes fluoresce green.
- Health & Medicine
Meat of the Matter: Fish, flesh feed gout, but milk counters it
Nutrition research supports the ancient notion that a diet rich in meat contributes to the development of gout, a form of arthritis common in men.
- Tech
Special Treatment: Fuel cell draws energy from waste
Researchers have created a fuel cell that breaks down organic matter in wastewater and, in the process, generates small amounts of electricity.
- Health & Medicine
Shutting Off an On Switch: Novel drugs slow two cancers in mice
By shutting down a signaling molecule on cancerous cells, scientists have found a way to slow multiple myeloma and fibrosarcoma, tests in animals show.
- Astronomy
Deepest Vision Yet: Hubble takes ultralong look at the cosmos
Astronomers unveiled the deepest visible-light portrait of the universe ever taken, a million-second-long exposure by the Hubble Space Telescope that includes near-infrared images of what appear to be the most-distant galaxies known.
- Anthropology
Brain Size Surprise: All primates may share expanded frontal cortex
A new analysis of brains from a variety of mammal species indicates that frontal-cortex expansion has occurred in all primates, not just in people, as scientists have traditionally assumed.
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Scrambled Dogma: Stem cells may make new eggs in women
Scientists may have come up with a new explanation for how a woman's biological clock works.
