Muscles are formed by the merging of many small myoblasts into larger myofibers. This fusion of mononucleated myoblasts with a single nucleus into multinucleated myofibers with multiple nuclei is an ...

What am I looking at? Here we see three RPEs with their cell bodies in brown (1) grown on a biodegradable scaffold in blue (2) and projections (small tendrils) emerging from the top of these cells in ...

Can you imagine living your life with a nose like the one on this rosette-nosed chameleon? While scientists aren’t sure why it evolved this unusual structure, many distinctive ornaments like this are ...

Serotonin is a biochemical compound that contributes to a variety of important biological functions, including the regulation of mood and emotions. Certain brain cells make serotonin and release it ...

Every process has a beginning and end, but sometimes the middle segment is the most interesting. This is an image of a neural stem cell in the midst of the process of differentiating into a neuron. In ...

These dark blue tubes splattered with red and green are fruit fly muscles. This image shows where the nerves and the muscles meet in the larva of a fly. These dark blue tubes splattered with red and ...

When a spiny flower mantis assumes this posture, it is hard to imagine an insect looking any flashier. But although this flamboyant appearance might seem attractive to us, it’s actually an attempt to ...

What am I looking at? These images show a single cell in the middle dividing into two so-called daughter cells. The stage of the cell division process represented here is called anaphase. In these ...

This seemingly red-hot macrophage is one of the key components of the human immune system. These cells identify, engulf, and destroy pathogens and allergens that enter our bodies and clean up cellular ...

Fun fact: The hexagon is the most common shape in nature. The hexagons in this image are in the eye of a dragonfly. Each hexagonal rod, called an ommatidium, contains major structures that have ...

What am I looking at? This is a single human hepatocyte. Its two nuclei are in blue (1). The other colors in this image are stains of the actin protein and are depth-coded, with red being the closest ...

Beauty is all around us. It is everywhere our eyes can see – in the breathtaking majesty of snowcapped mountains, in the tranquil shores of tropical beaches, and in the faces of those we love. But ...