Features
Foundations
Bile and Potatoes, 1921
One hundred years after its invention, BCG has stood the test of time as a vaccine against tuberculosis.
Reading Frames
Opinion: Facing Assumptions About the Duality of Human and Animal
Since Darwin published his landmark work on natural selection, we’ve understood that we’re animals. But that doesn’t mean we really believe it.
Infographics
Infographic: Steps in Cancer Metastasis
It’s now thought that in many cases, cancer cells disseminate from the primary tumor site early on and lie dormant for long periods rather than only venturing out from primary tumors at an advanced stage.
Infographic: A New Model of Synapse Strength
Synapses in the mouse neocortex can release multiple packages of neurotransmitters, suggesting that connection strength is more flexible than previously thought.
Infographic: The Role of Extrachromosomal DNA in Cancer
Researchers are uncovering how circular bits of DNA found in some cancer cells can help tumors evolve and kill.
Scientist to Watch
Bisrat Debeb Models How Cancer Spreads to the Brain
From his student days in veterinary medicine in Ethiopia to running a lab on metastasis at MD Anderson Cancer Center, Debeb has a passion for understanding how living things work.
The Literature
“Rogue” Protein Could Contribute to Humans’ High Cancer Rates
A mutant protein called Siglec-XII may promote carcinoma progression in humans, but inactivation of its gene seems to avoid the problem, according to a study.
Obesity-Linked Gut Bacteria May Worsen Graft-Versus-Host Disease
Altered gut microbiome composition in obese mice and human patients is linked with severity of disease after bone marrow transplantation, a study found.
Flexible Synapse Strength May Underpin Mammal Brain’s Complexity
Neural connections in the mouse neocortex can release multiple packages of neurotransmitters per electrical impulse, a study finds.
Bio Business
Pharma Looks to Inflammasome Inhibitors as All-Around Therapies
Many major biopharmaceutical companies are developing or acquiring drugs that target the NLRP3 inflammasome, a large intracellular complex that researchers say can spark inflammation and stoke diseases of lifestyle and aging.
Critic at Large
Opinion: AI Could Aid Cancer Diagnosis, but Caution Is Needed
While machine learning could improve detection of tumors at their earliest stages, it also risks identifying malignancies that would never cause the patient any harm.
Notebook
What a Video Game Can Reveal About Monkeys’ Minds
Researchers find that the animals can account for others’ behavior and circumstances in their strategies.
A Bright New Tool to Record Cellular Interactions
The G-baToN prototype transfers GFP between cells, illuminating cell-cell contacts.
Editorial
Our Expanding Universe
As with the evolution of astronomy, new insights in biology beckon just beyond our conceptual and observational reach.
Contributors
Contributors
Meet some of the people featured in the April 2021 issue of The Scientist.
Speaking of Science
Ten Minute Sabbatical
Take a break from the bench to puzzle and peruse.