A human T cell under attack by a virus (in yellow). (AP Photo/Seth Pincus)
A human T cell under attack by a virus (in yellow). (AP Photo/Seth Pincus) By adding a newly developed antibody to human cell cultures, researchers generated a greater number of more effective white blood cells that can slow a harmfully active immune system, according to a paper published in Science Signaling.

Membrane-separated compartments are visible inside the peroxisomes of 4-day-old Arabidopsis thaliana plant cells in this image from a confocal microscope. (Zachary Wright, Rice University)
Membrane-separated compartments are visible inside the peroxisomes of 4-day-old Arabidopsis thaliana plant cells in this image from a confocal microscope. (Zachary Wright, Rice University) A Rice University graduate student has identified a new subcompartment within peroxisomes, cellular organelles involved in metabolism, and suggested they may play important roles in managing fatty acids and offer a window into a range of disorders.

A scientist at the University of Florida Citrus Research and Education Center holds seedlings used for gene editing research. (Federica Narancio, AP)
A scientist at the University of Florida Citrus Research and Education Center holds seedlings used for gene editing research. (Federica Narancio, AP) A trio of Japanese researchers harnessed a DNA-repair mechanism in cells to make gene-editing more accurate and unintended changes less frequent, refining the use of CRISPR technology.

A woman cradles her pregnant belly. (Cassidy Rowell, Unsplash)
A woman cradles her pregnant belly. (Cassidy Rowell, Unsplash) When gestating mothers experience anxiety, it may affect brain development in their fetuses, scientists at Children’s National Hospital in Washington, D.C., have found.

A wastewater treatment plant. (Marcin Jozwiak, AP)
A wastewater treatment plant. (Marcin Jozwiak, AP) Tracking the spread of coronavirus through sewage could be improved by examining solid rather than liquid human waste, researchers found, enhancing a rapidly developing technique for containing the deadly disease through public health measures.

An open tanning bed in Sacramento, California. (Rich Pedroncelli, AP)
An open tanning bed in Sacramento, California. (Rich Pedroncelli, AP) Use of tanning beds and sunbathing may increase women’s risk of developing endometriosis, researchers found in a first-of-its kind study uncovering a possible cause for the poorly understood and often painful gynecologic disease.

A deer tick crawls along a leaf. (Erik Karits, Unsplash)
A deer tick crawls along a leaf. (Erik Karits, Unsplash) Bloodsucking ticks rely on an antibacterial enzyme stolen from ancient bacteria to survive on the human body, according to a new study, which emphasizes the findings’ potential to help slow the spread of Lyme disease.

Human colorectal cancer cells stained and under a microscope. (National Cancer Institute, Unsplash)
Human colorectal cancer cells stained and under a microscope. (National Cancer Institute, Unsplash) Humans gain some protection from cancer if nucleic acid segments at the ends of chromosomes are shorter, which helps to limit cell division, according to new research.

A smoker bends forward to light a cigarette. (Sajjad Zabihi, Unsplash)
A smoker bends forward to light a cigarette. (Sajjad Zabihi, Unsplash) Smoking cigarettes may increase the risk of COVID-19 infection, according to a study published Thursday in Cell Stem Cell, which found that airway stem cells exposed to cigarette smoke get infected by the new coronavirus in greater numbers than unexposed cells because of their weakened immunity.

Two UCLA studies have found that maternal stress during pregnancy may be linked to numerous health complications, including accelerated aging. (Photo by Isaac Quesada on Unsplash)
Two UCLA studies have found that maternal stress during pregnancy may be linked to numerous health complications, including accelerated aging. (Photo by Isaac Quesada on Unsplash) A mother’s stress during pregnancy and even prior to conception may result in a higher likelihood of preterm birth, as well as the child being more susceptible to faster aging, according to two recent studies out of the University of California, Los Angeles.

Genetic material from older COVID-19 viruses found in dust could help in outbreak tracking. (NIAID/NIH via AP, File)
Genetic material from older COVID-19 viruses found in dust could help in outbreak tracking. (NIAID/NIH via AP, File) The structure of a protein on cell surfaces may explain why certain animals such as mice and chickens have not contracted COVID-19, presenting clues for how scientists might develop a treatment for the disease and predict the next potential epidemic.