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tag mice culture evolution

Different colored cartoon viruses entering holes in a cartoon of a human brain.
A Journey Into the Brain
Danielle Gerhard, PhD | Mar 22, 2024 | 10+ min read
With the help of directed evolution, scientists inch closer to developing viral vectors that can cross the human blood-brain barrier to deliver gene therapy.
Cutting the Wire
Jeffrey M. Perkel | Dec 1, 2014 | 8 min read
Optical techniques for monitoring action potentials
For Olfaction, a Hypothesis is Felled
Peter Mombaerts | Oct 24, 2004 | 6 min read
Peter MombaertsCourtesy of Peter MombaertsRarely do scientific studies claim that something is not the case. Rarer still do negative results appear in top-tier journals. Yet two recent papers in Nature describe what olfactory sensory neurons do not do.12The olfactory system is often compared to the immune system. The key cell types in each system, the olfactory sensory neuron (OSN) and the lymphocyte, can detect a wide variety of chemicals, both natural and synthetic. Chemical recognition by the
Illuminating Behaviors
Douglas Steinberg | Jun 1, 2003 | 6 min read
Courtesy of Genevieve Anderson If not for Nobel laureates Thomas Hunt Morgan, Eric R. Kandel, and Sydney Brenner, the notion of a general behavioral model might seem odd. Behaviors, after all, are determined by an animal's evolutionary history and ecological niche. They are often idiosyncratic, shared in detail only by closely related species. But, thanks to Morgan's research in the early 20th century, and Kandel's and Brenner's work over the past 35 years, the fly Drosophila melanogaster, t
Epigenetics: Genome, Meet Your Environment
Leslie Pray | Jul 4, 2004 | 10+ min read
©Mehau Kulyk/Photo Researchers, IncToward the end of World War II, a German-imposed food embargo in western Holland – a densely populated area already suffering from scarce food supplies, ruined agricultural lands, and the onset of an unusually harsh winter – led to the death by starvation of some 30,000 people. Detailed birth records collected during that so-called Dutch Hunger Winter have provided scientists with useful data for analyzing the long-term health effects of prenat
Articles Alert
Simon Silver | Jul 8, 1990 | 7 min read
The Scientist has asked a group of experts to comment periodically upon recent articles that they have found noteworthy. Their selections, presented herein every issue, are neither endorsements of content nor the result of systematic searching. Rather, the list represents personal choices of articles the columnists believe the scientific community as a whole may also find interesting. Reprints of any articles cited here may be ordered through The Genuine Article, 3501 Market St., Philadelphia,
Soybeans Hit Main Street
Barry Palevitz | Mar 19, 2000 | 8 min read
Once a favorite of Chinese emperors, tofu is now big time. From supermarkets to health food boutiques, diet-conscious Americans are buying soybeans, not just as tofu but in infant formula, soy milk, and soy burgers. Soy even has the Food and Drug Administration's seal of approval. Last October the FDA responded to a petition by Protein Technologies International, a St. Louis-based DuPont company specializing in soy products, by authorizing claims that soy protein is good for the heart. Acc

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