This juvenile fish has developing bone stained red and developing cartilage stained blue.
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White blood cells engulf spores of the fungus Aspergillus fumigatus, which often causes disease in immunocompromised people.
The star-nosed mole's unusual appendages radiating around its nostrils have the highest nerve ending densities of any mammalian skin surface.
An embryo of the echinoderm Clypeaster subdepressus progresses from two cells, to four cells, to sixteen cells, and then to the gastrula stage.
Anopheles gambiae mosquitoes used for malaria research feed in the lab on blood through a thin membrane.
Fibroblasts with stained mitochondria (yellow), nuclei (green), and microfilaments (blue).
A pollen-covered bee of the species Halictus ligatus.
The endangered Ozark hellbender, which blends in with mud and rocks at the bottoms of Missouri and Arkansas streams, can grow up to two feet long and can live as long as 30 years.
Over the course of the development of the coral species Seriatopora hystrix, its fluorescence shifts from green to cyan.
These mice are twins, but because of epigenetic modification, one has a kinky tail while the other does not.
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