Biology

The brain is made of up billions of neurons and even more connections between neurons. We can get an idea of how neurons are connected across the human brain using a type of brain scan called diffusion-weighted magnetic resonance imaging (dMRI). How…

Image contributed by Yu Wang, a third year graduate student at Harvard Medical School. Glial cells support the proper function of neuronal cell types and are also responsible for cleaning up cell debris such as leftover neurotransmitter molecules (what…

Scientists at the J. Craig Venter Institute have created a fast-growing bacterial cell with a nearly-minimal number of genes necessary for survival – just 473 in total. These genes were entirely synthesized - not transplanted from a grown organism - and…

Presented by Vinidhra Mani The skin is our first barrier to entry of pathogens. The tightly regulated immune system in our skin provides us with a robust arsenal to combat potential invaders, yet also has checkpoints to ensure that the battlefields…

These images show cross sections of the different compartments of the developing gut in a chick embryo: esophagus (top), small intestine (middle), and large intestine (bottom), at days 6, 8, 10, and 14 (left to right). As the chick develops, the shape of…

by Jessleen K. Kanwal figures by Brad Wierbowski Imagine for a moment that you are unable to taste or smell anything.  For many patients undergoing chemotherapy, this is an everyday reality of their daily fight against cancer.  Chemotherapy kills…

This Bovine Pulmonary Artery Endothelial (BPAE) cell is stained to show two components of the cytoskeleton – microtubules in green, and actin filaments in red (in the top right panel). The cell is a crowded place, so one of the functions of the…

by Steph Guerra figures by Krissy Lyon Reproducibility in science is not very sexy. Because our scientific culture generally rewards innovation over cautiousness, replicating a study conducted by others will not get a researcher a publication in a…

Obesity is a growing problem in the United States, and this map from 2007 shows the percentage increase in cases of obesity by state in the US between 1987 and 2007. Identifying the causes of obesity, both environmental and genetic, is important to…

by Mary E. Gearing figures by Kristen Seim Summary: In addition to providing energy in the form of calories, our food also supplies us with essential vitamins and other nutrients to keep us healthy. Vitamin, or “micronutrient”, malnutrition is a…