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Mouse muscle cells like those seen here can grow up to 20 micrometers across, or roughly 3.5 times smaller than the width of a human hair.

It looks as if this juvenile crab got a dye job at the salon – but it’s actually an image taken under ultraviolet light. Tiny crabs at this stage of their life cycle are free-floating. As adults, they ...

While this might look like an impressionistic painting of a lush bouquet, it’s actually a microscopic image of mold growing in a culture dish. In fact, if you’ve ever wondered what the fuzz on those ...

What am I looking at? This image is a 1.5-millimeter-thick horizontal slice through the brain of a mouse. It shows the neurons that produce serotonin in purple (1) and pyramidal neurons in green (2).

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 ...

Actin proteins group together to form a network of thin filaments that spread throughout eukaryotic cells. These filaments are involved in giving the cell its structure, allowing the cell to move, and ...

These male stag beetles have developed some impressive mandibles (mouthparts) to win mates. Male stag beetles will battle it out with other males to demonstrate who is the largest and strongest and ...

This rearing caterpillar will eventually transform into an owl moth – which gets its name from the brown, tan, and black pattern on the wings of the adult moth because they resemble owl feathers. Get ...

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 ...

Imagine going to the dentist with this set of teeth! These are teeth located on a snail’s “tongue,” or radula, also called a rasper, which is constantly licking the ground to scrape up and transport ...

This cross section through the head of a jumping spider shows off the interior structure of four of its eight eyes. Jumping spiders have the most acute vision of any terrestrial invertebrate. In fact, ...