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a microscope image of a rotifer
Bacterial Enzyme Keeps Rotifers’ Transposable Elements in Check
Christie Wilcox, PhD | Mar 3, 2022 | 5 min read
Jumping genes in bdelloid rotifers are tamped down by DNA methylation performed by an enzyme pilfered from bacteria roughly 60 million years ago, a study finds.
To Effectively Discuss Evolution, First Define 'Theory'
Ricki Lewis | May 11, 1997 | 9 min read
Evolution is the backbone of modern biology, but life scientists sometimes face audiences who perceive it as a threat to their religious beliefs. With laws such as North Carolina House Bill 511, proposed in March as an attempt to "ensure that evolution is not taught as fact in North Carolina public schools," scientists are being asked to clarify the distinction between science and religion. Professors at small Southern and Midwestern colleges seem to have the most experience in discussing-and s
Outsmarting Influenza's Rapid Evolution
Philip Hunter | Jun 29, 2003 | 7 min read
Twice yearly, World Health Organization health officials meet to strategize against influenza, a malady that kills at least 250,000 people each year. In a chess match of sorts, they work to predict their opponent's next move, in this case by modifying vaccines to compensate for changes in the critical viral antigen hemagglutinin, which triggers the host's long-term immune memory. It takes several months to manufacture and distribute flu vaccines in sufficient quantities to inoculate vulnerabl
The Genetics of Society
Claire Asher and Seirian Sumner | Jan 1, 2015 | 10 min read
Researchers aim to unravel the molecular mechanisms by which a single genotype gives rise to diverse castes in eusocial organisms.
Forthcoming Books
The Scientist Staff | Nov 1, 1987 | 4 min read
ARCHAEOLOGY The Birth of Prehistoric Chronology: Dating Methods and Dating Systems In Nineteenth Century Scandinavian Archaeology. Bo Graslund. Cambridge University Press November, 150 pp, $39.50. Traces the origin and subsequent development of dating systems, examining how these systems grew and were improved and refined. BIOCHEMISTRY Biochemistry of Metabolism: Volume 11. David D. Davies, ed. Academic Press: November, 388 pp, $85. Discusses the metabolism of plants, emphasizing the b
A C-fern (Ceratopteris richardii) growing in a pot
Genome Spotlight: C-fern (Ceratopteris richardii)
Christie Wilcox, PhD | Sep 22, 2022 | 5 min read
Sequences for the model organism and two of its kin reveal how these plants got their oversized genomes.
Surpassing the Law of Averages
Jeffrey M. Perkel | Sep 1, 2009 | 7 min read
By Jeffrey M. Perkel Surpassing the Law of Averages How to expose the behaviors of genes, RNA, proteins, and metabolites in single cells. By necessity or convenience, almost everything we know about biochemistry and molecular biology derives from bulk behavior: From gene regulation to Michaelis-Menten kinetics, we understand biology in terms of what the “average” cell in a population does. But, as Jonathan Weissman of the University of Califo
A Pioneer Presses Search For 'Other Side of Biology'
Gerald Edelman | Nov 13, 1988 | 4 min read
When I was a high school student, I came across Erwin Schrödingers What Is Life?. I still remember my exultant reaction—a combination of adolescent pride in feeling able to understand ideas considered beyond a young person’s means, and a genuine intellectual thrill engendered by the problems that Schrödinger addressed. Upon rereading the book, it appears to me that its major value was to provoke interest in a central problem of biology. Schrödinger’s question
illustration of a mitochondrian inside a cell
Could Dad’s Mitochondrial DNA Benefit Hybrids?
Alejandra Manjarrez, PhD | Jan 20, 2022 | 7 min read
Studies have found that organisms can inherit mitochondria from male parents in rare instances, and both theoretical and experimental work hint that this biparental inheritance is more than just a fluke.
Mining Bacterial Small Molecules
L. Caetano M. Antunes, Julian E. Davies and B. Brett Finlay | Jan 1, 2011 | 10 min read
As much as rainforests or deep-sea vents, the human gut holds rich stores of microbial chemicals that should be mined for their pharmacological potential.

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