Uncategorized
- Earth
Grazing on the Periodic Table: Some ancient microorganisms lived on a diet of pure sulfur
Microorganisms that lived 3.5 billion years ago obtained energy by metabolizing pure sulfur.
- Health & Medicine
Debate Renewed: Diabetes drug ups heart risk
A popular diabetes drug significantly increases the risk of heart failure and heart attack in those who take it.
- Animals
Fish Switch: Salmon make baby trout after species, sex swap
Salmon implanted with trout reproductive tissue bred to produce a generation of normal rainbow trout.
- Planetary Science
Survivor: Extrasolar planet escapes stellar attack
An extrasolar planet survived after its aging parent star ballooned into a red giant that almost engulfed it.
- Physics
Alliance of Opposites: Electrons and positrons make new molecule
Positronium, consisting of electrons and their antimatter counterparts, has been made into a molecular form.
- Health & Medicine
Blood vessel growth factor also does housekeeping
A growth factor that promotes blood vessel development also maintains normal blood vessel health, perhaps explaining the vascular side effects of some cancer drugs.
- Astronomy
Bloated planet
A newly discovered exoplanet is the largest and lowest-density such object yet found.
- Chemistry
Nanoparticles multitask
Magnetite nanoparticles have catalytic properties that may be useful in wastewater treatment and biomedical assays.
- Archaeology
Ancient city grew from outside in
A 6,000-year-old city in what's now northeastern Syria developed when initially independent settlements expanded and merged, unlike other nearby cities that grew from a core outward.
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19883
Your article notes how groups of people may have different numbers of copies of the amylase gene. Is it correct then that individuals have varying numbers of the gene as well? If so, would this explain why some people don’t like meat and become vegetarians and others just need to eat meat? Robert KraseSpringville, Calif. […]
- Anthropology
Advantage: Starch
An enhanced ability to digest starch may have given early humans an evolutionary advantage over their ape relatives.
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Perfect pitch isn’t so perfect in many
Among people with perfect pitch, the most common error seems to be misidentifying G flat as A, the note on which orchestras traditionally tune.
