Uncategorized
- Materials Science
Melt-Resistant Metals: Carbon coating keeps atoms in order
Shrink-wrapped in carbon, nanoscale metal chunks melt at extraordinarily high temperatures, suggesting carbon coatings as a route to higher heat resistance for materials and devices.
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Gypsy Secret: Children of sea see clearly underwater
Children who regularly dive to collect food have better-than-normal underwater vision because their eyes adapt to the liquid environment.
- Tech
Columbia Disaster Working Hypothesis: Wing hit by debris
The independent board investigating the breakup of the space shuttle presented its first detailed account of what might have caused the Feb. 1 disaster.
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19322
Your article neglects the most difficult problem associated with sending a probe to the vicinity of Earth’s core: sending the information back. Even a few feet of earth will stop conventional radio waves. Extra-low-frequency transmissions would do the job, but a transmission could take years. Augusto Soux San Diego, Calif. David J. Stevenson of the […]
- Earth
Going Down? Probe could ride to Earth’s core in a mass of molten iron
A geophysicist suggests that scientists could explore Earth's inner structure by sending a grapefruit-size probe on a week-long mission to the Earth's core inside a crust-busting mass of molten iron.
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19242
There is another interpretation of the mitochondrial DNA data presented in this article. The data make it clear that the more advanced Cro-Magnon males only mated with Cro-Magnon females; however, there is no evidence that the Cro-Magnon females didn’t mate with the more muscular Neandertal males. Jeff Nicoll and Joan Cartier Washington, D.C. Much mixing […]
- Anthropology
Stone Age Genetics: Ancient DNA enters humanity’s heritage
Genetic material extracted from the bones of European Stone Age Homo sapiens, sometimes called Cro-Magnons, bolsters the theory that people evolved independently of Neandertals.
- Humans
Sea burial for Canada’s cod fisheries
The Canadian government has declared an end to cod fishing in nearly all of the country’s Atlantic waters.
- Materials Science
Zeolites get an organic makeover
Scientists can now incorporate organic groups into the framework of zeolites, a kind of inorganic crystal.
- Health & Medicine
Boosting the TB vaccine
A new vaccine for tuberculosis outperforms the current one in tests on animals.
- Chemistry
Drug smugglers leave cellular tracks
Imaging reveals where some experimental nanoscale capsules ferry drugs when they enter cells.
- Astronomy
A black hole that goes the distance
Astronomers have measured the mass of the most distant black hole known.
