This vivid chameleon embryo has been stained to highlight the bones and cartilage of its skeleton. You can also see some of its developing internal organs. This vivid chameleon embryo has been stained ...

This video presents a progressive rainbow of neurons in the brain of a fruit fly – but this is just a small sampling of the more than 135,000 neurons in a typical fruit fly’s brain. This video ...

During pregnancy and breastfeeding, milk-producing cells that surround the branching network of ducts in the breast swell to form spherical groups called alveoli. These alveoli are where milk is ...

What am I looking at? These images are a series of 1-millimeter-thick slices from front to back through the brain of a mouse, with ChAT neurons (1) in purple and pyramidal neurons (2) in green. The ...

Love them or hate them, snakes are biologically fascinating. This image shows the skeleton of a corn snake. Its flexible spine and jaws allow it to eat animals like mice and rats that you would never ...

These leopard geckos don’t have the characteristic gipping pads on their toes that are commonly associated with geckos. However, as you can see here, they are still highly proficient climbers. These ...