Biology

by Jeff Bessen cartoon by Shannon McArdel Before forming an opinion on genetically modified foods, one should understand what genes are in the first place. Knowledge of the history and biological function of genes helps explain why scientists are almost…

by Mary E. Gearing figures by Kristen Seim Heart disease is the number one cause of death in the United States [1]. Today, patients with a family history of heart disease or risk factors such as elevated “bad” cholesterol (low-density lipoprotein or LDL…

by Joseph Timpona We often think of viruses as foreign invaders– microscopic agents intent on making us sick before spreading to the next victim.  However, some viruses become enduring guests by hitchhiking a permanent ride in our genomes. In fact,…

by Grigori Guitchounts figures by Brian Chow For decades, we have known that specialized neurons in the hippocampus of rodents called place cells reflect the animals’ location in space. Meanwhile, studies have also implicated the hippocampus in…

Scanning electron micrograph of methicillin-resistant Staphylococcus aureus (brown) surrounded by cellular debris.Credit: Credit: NIAID/NIH (NIAID Flickr’s photostream) [Public domain], via Wikimedia Commons A 1000-year-old Anglo-Saxon recipe for…

A 5000x magnification view of diatoms, a type of tiny algae. (Credit: from Jim Mikulak (The English Wikipedia) via Wikimedia Commons.) Scientists at Zhejiang University have recently published an improved method for removing arsenic from drinking water,…

Watch out, honey fans – populations of the honey bee, Apis mellifera, may be in decline, and we don’t really know why. Honey bees play a vital role in natural ecosystems as pollinators; it is estimated that a single bee can visit 2000 flowers in a day…

The black fibers seen in this image are tubulin, a protein that makes up a large part of the cytoskeleton of all cells. The cytoskeleton provides structural support for the cell, and tubulin also performs specific functions such as the mitotic spindle.…

Fossilized remains of cyanobacteria thought to be among the first organisms on earth (Wikimedia Commons). How did life originate? This puzzle has been studied by scientists for hundreds of years. Authors of a new paper in Nature have made significant…

Presented by Thomas Graham The DNA inside one of your cells, if stretched end to end, would be about two yards long and less than 1/50,000 the width of a human hair. Your cells have been following the instructions in your DNA since you began life as a…