Uncategorized
- Planetary Science
Solar craft reaches a new low
The Ulysses spacecraft passed directly below the sun on Feb. 7, looking up at its south pole, a feat the craft has done only twice before.
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19795
Fractal characteristics associated with Jackson Pollack’s paintings are interesting, but to determine authenticity, it would seem that two propositions would have to be proved: first, that Pollack’s paintings always had fractal character; and second, that only Pollack’s paintings had fractal character. Both seem highly dubious. Steve JohnsonPrairie Village, Kan. In doing drip or splash painting, […]
- Humans
Fractal or Fake?
A physicist who uses fractals to investigate the authenticity of some paintings attributed to Jackson Pollock finds that the works may be fake. But is the flaw in the paintings or in the fractal analysis?
- Astronomy
Studies of Light and Shadow
Two new surveys of the night sky examine the two facets of galaxy formation: the glitter and the gloom.
- Humans
Letters from the February 24, 2007, issue of Science News
No piece of cake The new mathematical method for equitable cake sharing (“A Fair Slice: New method makes for equitable eating,” SN: 12/16/06, p. 390) actually leads to a version of Zeno’s paradox. The problem is that the cake remnant left after the referee gives the two eaters their respective, equally valued pieces is no […]
- Humans
From the February 13, 1937, issue
A model for flood control and a 1-ton robot that solves equations.
- Earth
Ozone Depletion and Recovery
Answers to questions about ozone depletion and the recovery of the ozone hole are now easy to find by researchers, as well as the general public, through a new online index developed by NOAA’s Earth System Research Laboratory. The site uses simple graphs and charts to track progress in reducing the threat to Earth’s ozone […]
- Math
The Complexity of TipOver and Other Puzzles
Solving puzzles such as TipOver and River Crossing can be surprisingly difficult.
- Animals
Perils of Migration: New evidence that bats stalk birds
Big Mediterranean bats snatch migrating songbirds out of the night sky in spring and fall.
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Bridging the Divide? Technique sheds light on cleft palate gene
A new approach has enabled researchers to prevent cleft palate in mice genetically engineered to develop that birth defect.
- Earth
Stroke of Good Fortune: A wealth of data from petrified lightning
The lumps of glass created when lightning strikes sandy ground can preserve information about ancient climate.
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19794
Finding CO2 levels that are 2,500 times higher in 5,000-year-old fulgurites than in modern samples, scientists have speculated that the extra CO2 resulted from vaporization of organic material by lightning. Could some of this gas reflect elevated atmospheric CO2? And if so, could current laments regarding “unprecedented levels” of CO2 be insupportable? John M. CorboyMililani, […]
