A California coyote above Santa Monica beach
Human Gut Bacteria Show Up in Urban Wildlife
The gut microbiomes of city-dwelling animals, including coyotes, lizards, and birds, show similarities to those found in humans who also live in urban environments.
Human Gut Bacteria Show Up in Urban Wildlife
Human Gut Bacteria Show Up in Urban Wildlife

The gut microbiomes of city-dwelling animals, including coyotes, lizards, and birds, show similarities to those found in humans who also live in urban environments.

The gut microbiomes of city-dwelling animals, including coyotes, lizards, and birds, show similarities to those found in humans who also live in urban environments.

gut microbiome
Bright purple and orange lactobacillus bacteria.
How a Specific Gut Bacterium May Cause Type 1 Diabetes
Dan Robitzski | Aug 25, 2022 | 5 min read
A bacterium that produces an insulin-like peptide can give mice type 1 diabetes, and infection with the microbe seems to predict the onset of the disease in humans, a study finds.
A premature infant drinking from a bottle
In Search of the Best Milk Recipe for Preemies’ Gut Bacteria
Alejandra Manjarrez | Aug 22, 2022 | 5 min read
Milk fortifiers of human origin show no evident advantage in the development of the gut microbiota of premature infants over fortifiers derived from cows, while the intake of the mother’s own milk does, two studies suggest.
An abstract stained-glass portrait of a woman with an image of an eye representing the brain
Through the Looking Glass: Aging, Inflammation, and Gut Rejuvenation
Iris Kulbatski, PhD | 4 min read
Renewing the aging gut microbiome holds promise for preventing inflammatory brain and eye degeneration.
A jar full of artificial sweetener packets.
Artificial Sweeteners Alter Gut Bacteria in Humans
Shafaq Zia | Aug 19, 2022 | 4 min read
When consumed for as little as two weeks, common alternatives to sugar affect intestinal bacterial communities, with some reducing the body’s ability to regulate blood glucose levels, a study finds.
Illustration of bacteriophages infecting a bacterium
Phages Treat Gut Inflammation in Mice
Andy Carstens | Aug 4, 2022 | 5 min read
Mixtures of viruses that attack inflammatory bowel disease–causing bacteria in mice also survive the digestive tract and are well-tolerated in humans, a study finds.
A person holding a section of his face and looking in to his brain through a magnifying glass stock illustration
Science Philosophy in a Flash - A Look at Aging Through Young Eyes 
Iris Kulbatski, PhD | 1 min read
Aimée Parker shares how her childlike curiosity and collaborative spirit motivate her scientific pursuits.
illustration of inside of gut with floating bacteria
Finding Could Pave the Way to New, Targeted Antibody Treatments
Natalia Mesa | Jul 8, 2022 | 3 min read
IgA antibodies appear to bind to specific species of commensal gut bacteria in mice, according to a study.
A section of a mouse distal colon showing luminal contents with bacteria in magenta, the mucus lining (green) and the epithelial cell barrier of the gut (blue, right).
Mapping the Neighborhoods of the Gut Microbiome
Abby Olena | Jul 1, 2022 | 5+ min read
Researchers are going beyond fecal samples to understand how the patterns of commensal microbes in the gastrointestinal tract influence development and health.
Mummified Gut Bugs Reveal Ancient Dietary Secrets
Mummified Gut Bugs Reveal Ancient Dietary Secrets
Iris Kulbatski, PhD | 5 min read
Reconstructing the diet and microbiome of human ancestors shows an astonishingly rapid loss of microbiome diversity.
Photo taken from the perspective of a lab worker in a white coat and purple gloves preparing multiple fecal transplant capsules at a time.
Banking Previous Poos: Could a Transplant of Feces from Your Past Heal You?
Dan Robitzski | Jun 30, 2022 | 5+ min read
The Scientist spoke with Brigham and Women’s Hospital and Harvard Medical School researchers Scott Weiss and Yang-Yu Liu, who propose that people bank stool samples when they’re young and healthy so that they can be transplanted to rejuvenate the gut microbiome later on.
Artist’s rendition of bright blue microbes among intestinal lining
Study Links Depression with High Levels of an Amino Acid
Dan Robitzski | Jun 14, 2022 | 5 min read
Experiments in animals and observations in humans suggest that the amount of proline circulating in one’s plasma has a strong association with depression severity.
A white lab mouse peers over the wall of a sprawling maze
Bacterial Metabolite May Regulate Cognition in Mice
Sophie Fessl | Jun 3, 2022 | 3 min read
Microbes in the gut influence the death of support cells in the brain by producing isoamylamine, a study suggests.
Person taking antibiotic pill
What Happens to the Gut Microbiome After Taking Antibiotics?
Sophie Fessl | May 5, 2022 | 5 min read
Studies are finding that a single course of antibiotics alters the gut microbiomes of healthy volunteers—and that it can take months or even years to recover the original species composition.
A top-down view of bowls filled various high-fiber foods such as rice, corn, seeds, and cereal sitting on a wooden table.
Different Dietary Fibers Affect the Body in Unique Ways
Rachael Moeller Gorman | May 3, 2022 | 4 min read
Acting through the microbiome, the fiber arabinoxylan reduces cholesterol in many people, while another fiber, called long-chain inulin, increases inflammation, a study finds.
Composite image of earliest humans and wooly mammoths
New Evidence Complicates the Story of the Peopling of the Americas
Emma Yasinski | May 2, 2022 | 5+ min read
New techniques have shown that people reached the New World far earlier than the long-standing estimate of 13,000 years ago, but scientists still debate exactly when humans arrived on the continent—and how.
Illustrated map showing where evidence was found of the earliest humans
Infographic: Mixed Evidence on Human Occupation of the Americas
Emma Yasinski | May 2, 2022 | 3 min read
Diverse lines of evidence point to humans’ presence in the New World long before the dawn of Clovis culture. But rewriting this chapter of human history raises many questions about how these early people came to inhabit these continents.
Baby with spotted onsie about to get injection of vaccine
Antibiotics Tied to Lower Effectiveness of Childhood Vaccines
Natalia Mesa | Apr 28, 2022 | 2 min read
Use of the drugs in children under the age of two was associated with lower antibody levels after the jabs—perhaps, researchers suggest, due to microbiome alterations.
illustration of neurons in blue with synapses lighting up
Gut Molecule Linked to Decreased Myelination in Mouse Brains
Angie Voyles Askham, Spectrum | Feb 17, 2022 | 5 min read
A study shows that a molecule produced by intestinal microbes can enter the brain and that its presence is also associated with altered brain connectivity.
Illustration of gray bacteriophages approaching and infecting a red and orange bacteria that has multiple fimbria protruding from it.
Bacteria-Infecting Viruses in Gut Microbiome Linked to Cognition
Dan Robitzski | Feb 16, 2022 | 5 min read
Research in mice and flies suggests that bacteriophages, including those found in dairy foods, may have an influence on an animals’ ability to learn and remember information.