5,519 results
- Earth
Dinosaurs, in living color
Researchers find microscopic structures in some fossils that may have held pigments.
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Unnatural selection
Chemists build proteins with parts not in the typical toolkit.
- Plants
Chlorophyll gets an ‘f’
New variety of photosynthetic pigment is the first to be discovered in 60 years
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I, Mold
Conquering the rising tide of infection is hindered by the many similarities between humans and fungi.
- Life
Gene profiles may predict TB prognosis
A molecular profile may help doctors predict who will get sick from TB infections.
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Vitamin D is essential to the modern indoor lifestyle
It’s known that vitamin D is necessary for proper bone formation and maintenance. But recent decades have seen a torrent of studies suggesting that vitamin D can also affect many other aspects of health; some scientists have come to consider the daily recommended intake of 400 international units of vitamin D far too low. Michael […]
- Chemistry
Guards of the blood-brain barrier identified
Specialized cells called pericytes are crucial to protecting the central nervous system, two new studies demonstrate.
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Letters
Snack addicts The experiment outlined in “Junk food turns rats into addicts” (SN: 11/21/09, p. 8) seems to have overlooked an ingredient list. The junk foods fed to the rats were junky, to be sure, but which foods were the most addictive? Many junk foods are filled with alarming amounts of things like monosodium glutamate. […]
- Humans
Cigarettes might be infectious
Science & Society blog: The tobacco in cigarettes hosts a bacterial bonanza — literally hundreds of different germs, including those responsible for many human illnesses, a new study finds.
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From fringe to electromicrobiological mainstream
Trained as a microbiologist, Ken Nealson pursues many interdisciplinary endeavors. He was a pioneer in the field of geomicrobiology and has worked on astrobiology and microbial fuel cells. He holds posts at the University of Southern California in Los Angeles and the J. Craig Venter Institute in San Diego, where he uses genomics to survey […]
- Chemistry
Different strokes
Though they share the same design, new micromachines are not a synchronized swimming team.
- Earth
Perforated blobs may be early sponges
Odd shapes in Australian rocks could be the oldest fossil evidence of multicellular animals.
