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bacteria and DNA molecules on a purple background.
Engineering the Microbiome: CRISPR Leads the Way
Mariella Bodemeier Loayza Careaga, PhD | Mar 15, 2024 | 10+ min read
Scientists have genetically modified isolated microbes for decades. Now, using CRISPR, they intend to target entire microbiomes.
Monitoring Mutations with Microfluidics
Ruth Williams | Mar 15, 2018 | 3 min read
A device dubbed the “mother machine” enables real-time observation of mutagenesis in single bacterial cells.  
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.
Biological Terrorism
Jennifer Fisher Wilson | Nov 11, 2001 | 8 min read
One warning came in black-and-white in 1993: A U.S. Congressional Office of Technology Assessment report projected that releasing 100 kilograms of aerosolized anthrax spores upwind of the U.S. capital could kill between 130,000 and 3 million people-a lethality at least matching that of a hydrogen bomb. Last year, a U.S. Justice Department exercise revealed that discharging pneumonic plague in Denver could create 3,700 or more cases, with an estimated 950 or more deaths within a week.1 Then, acco
A scanning electron micrograph of a coculture of E. coli and Acinetobacter baylyi. Nanotubes can be seen extending from the E. coli.
What’s the Deal with Bacterial Nanotubes?
Sruthi S. Balakrishnan | Jun 1, 2021 | 10+ min read
Several labs have reported the formation of bacterial nanotubes under different, often contrasting conditions. What are these structures and why are they so hard to reproduce?
New Molecular Tools Enable Researchers To Correlate Viruses, Diseases
Karen Young Kreeger | Feb 4, 1996 | 7 min read
Viruses, Diseases Author: Karen Young Kreeger Sidebar: Professional Resources for Viral Disease Researchers In the mid- to late 1980s, numerous correlations were discovered between viruses and various types of cancers. For example, Epstein-Barr virus was associated with nasopharyngeal carcinoma and B-cell lymphoma, hepatitis B virus with liver cancer, and human papillomavirus with cervical cancer. Now, a decade later, basic and clinical scientists are finding out that viruses may also play a r
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
Human Pluripotent Cells Pass Safety Test
Douglas Steinberg | Sep 1, 2002 | 7 min read
Image: ©2001 MacMillan Publishers Ltd.  PLURIPOTENT-CELL PIPELINE: To obtain embryonic germ cells, researchers culture primordial germ cells (PGCs) dissected from the genital ridge. If left in situ, a PGC develops into spermatozoa or ova after its imprints have been erased and reestablished. Embryonic stem cells come from the blastocyst's inner cell mass. (Reprinted with permission, Nature 414:122-8, 2001) Because the science is hard and the politics mean, progress in understanding
Updated Sept 1
coronavirus pandemic news articles covid-19 sars-cov-2 virology research science
Follow the Coronavirus Outbreak
The Scientist | Feb 20, 2020 | 10+ min read
Saliva tests screen staff and students at University of Illinois; Study ranks species most susceptible to SARS-CoV-2 infection; COVID-19 clinical trials test drugs that inhibit kinin system
Stem Cell Discoveries Stir Debate
Douglas Steinberg | Nov 12, 2000 | 9 min read
Editor's Note: This is the first of two articles on questions raised by recent stem cell discoveries. The second article, focusing on various organs and the nervous system, will appear in the Nov. 27 issue of The Scientist. Researchers first isolated embryonic stem cells (ESCs) from mouse blastocysts almost 20 years ago, and a paper announcing the discovery of human ESCs emerged in 1998. Adult-derived stem cells (ASCs) have since become the rage in certain quarters of biology, with unexpected--

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