During development, cells move around constantly. Often, specific cell types arise in one area of the developing organism but then need to migrate to another destination as the organism grows and ...

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 ...

This image shows two different organisms, an alga and a plant, both of them intriguing to look at under a microscope. The rod-shaped creature is a type of alga called a desmid. It is set against the ...

In some cultures, a rabbit’s foot is thought to confer good luck. Here, however, you’re looking a a sample of a rabbit’s skin. Researchers have learned a great deal about rabbit skin by examining ...

This is the underside of a gecko, offering a great view of their incredible feet and toes, which allow them to climb on nearly any surface. Get a closer view of the image Get a closer view of the ...

If the color purple makes you happy, you’re not alone. The purple cells in this image produce serotonin which plays a key role in the control of mood and emotions. If the color purple makes you happy, ...

The human immune system usually works wonders, protecting us from all sorts of diseases. However, if the immune system goes into overdrive, it can become even more dangerous than the diseases it ...

What would you see if you peered inside a human small intestine? Here’s a glimpse at its structure, revealing a community of cells with different functions. A biopsy like this is generally very small ...

This time-lapse video shows the development of the nervous system in a fruit fly embryo as it transitions to the larval stage. Fruit flies have a high reproduction rate and a very short gestation ...

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 ...

Confetti mice are very useful in research because they allow scientists to track which cells produce which proteins based on their color under a fluorescent microscope. These mice are particularly ...

This colorful “explosion” is a choroidal neovascular (CNV) complex in the retina of a rat. A CNV complex is an abnormal growth of blood vessels under the retina after an injury. This colorful ...