Uncategorized
- Anthropology
New World Newcomers: Men’s DNA supports recent settlement of the Americas
New data on genetic differences among the Y chromosomes of Asian and Native American men support the notion that people first reached the Americas less than 20,000 years ago.
- Paleontology
Three Species No Moa? Fossil DNA analysis yields surprise
Analyses of genetic material from the fossils of large flightless birds called moas suggest that three types of the extinct birds may not be separate species after all.
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Winning Bet: Horse and mule clones cross the finish line
Scientists have for the first time cloned a mule and a horse.
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19266
In your article, you state that the cloned foal Prometea is a genetic twin of her birth mother which contributed the nuclear DNA. This is not true, as twins have identical nuclear and mitochondrial genes. The cytoplasm of the cloned foal was obtained from a slaughtered horse. The cytoplasm, and therefore the mitochondrial genes, of […]
- Health & Medicine
Virus Shield: Ebola vaccine works fast in monkey test
Tests on monkeys show that an experimental vaccine can build immunity against Ebola virus within a month, suggesting the vaccine might help contain outbreaks of the deadly pathogen.
- Computing
Resistance leaps as magnetism mounts
A tiny traffic island for electrons promises to serve as an extraordinarily sensitive detector of magnetic fields.
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19335
I have a real problem with the way that the so-called robot-designed robot is described in this article. I used to do large-scale manufacturing automation, and I consider what is being done a parlor trick. There are only two things that could be called “robotic” in the system: The computer-aided manufacturing machinery that built the […]
- Tech
Robots making robots, with some help
A new type of robotic system that designs and produces robotic offspring may represent a first step toward self-replicating "artificial life."
- Computing
Going to digital extremes
A researcher designs the ultimate laptop, stretching the laws of physics to their limits to achieve blazing computation rates.
- Earth
Bt corn pollen can hurt monarchs
A second test of a strain of corn genetically engineered to make its own insecticide finds potential for harm to monarch butterfly caterpillars.
- Ecosystems
Virtual skylarks suffer weed shortfall
A new mathematical model raises the concern that switching to transgenic herbicide-tolerant crops could deprive birds of weed seeds.
- Archaeology
Maya palace suddenly expands
Archaeologists find a sprawling palace and other surprises at a 1,300-year-old Maya site in Guatemala.
