Uncategorized
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19701
This article makes two questionable assertions. First, Tyrannosaurus rex might well have had excellent binocular vision and been a predator, but still have had a handicap for the detection of motion as my cats do. Second, when Thomas R. Holtz Jr. states that binocular vision “almost certainly was a predatory adaptation,” that puts us binocular […]
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Gay Males’ Sibling Link: Men’s homosexuality tied to having older brothers
Birth order may steer some men toward homosexuality in a process that perhaps begins before birth.
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19700
If having biological older brothers correlates to homosexuality, as claimed in your article, then we would expect that in the past, when families were larger, there would be a greater proportion of homosexuals. Is there any evidence for this? Rick NorwoodMountain Home, Tenn. The article concludes with psychologist Daryl Bem inferring that male homosexuals are […]
- Tech
Blinding spies’ digital eyes
To prevent unauthorized picture taking, an automated antispy system spots digital cameras and zaps them with confounding flashes of light.
- Materials Science
Seeing the light
Researchers have developed a smart petri dish that signals cell death with intense light.
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Mammalian ear cells can regenerate
The cells responsible for hearing in mammals may be capable of regeneration, just as those of birds and other vertebrates are.
- Tech
Humanlike touch from chemical film
A nanoparticle-laden, pressure-detecting membrane feels textures with about the same sensitivity as human skin.
- Humans
With permission to nap, doctors stay more alert
Allowing doctors-in-training who are on call to hand off to another doctor the pager that summons them to the next patient increases the amount of sleep they get and reduces their fatigue.
- Health & Medicine
Pregnancy risk from blood pressure drugs?
Babies exposed in the first trimester of their mother's pregnancy to blood pressure drugs called ACE inhibitors are at an increased risk of birth defects.
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Cells in bloodstream don’t refill ovaries
Contrary to a report published last year, cells that circulate in a female mammal's blood don't seem to restock its egg supplies.
- Astronomy
Galactic de Gustibus
About 13 billion years after its birth, our galaxy is still packing on the stars.
- Anthropology
Mexican find reveals ancient dental work
A 4,500-year-old human skeleton found in Mexico represents the earliest instance in the Americas of intentionally modified teeth, apparently to create space for a ceremonial mouthpiece.
