Content by The Scientist

A section of a chick spinal cord with interneurons labeled in green and neural progenitors in red and blue

This tapeworm (Hymenolepis microstoma) lives in the small intestine or bile duct of mice.

Computerized traces of typical mice (right) and mice exhibiting some Alzheimer's disease-like behaviors (left) exploring a circular arena

Electron micrograph of the underside of a Giardia muris parasite, which causes severe diarrhea, settled on the surface of a rat's intestinal wall

November 2013's selection of notable quotes

Seba's short-tailed fruit bat (Carollia perspicillata) embryos collected in the wild at about 50, 65, and 70 days of development (left to right)

A harvestman (Leiobunum flavum), also known as a daddy long legs

This ant was infected by the zombie-ant fungus, which caused it to march to its death at a mass grave, where fungal spores erupted out of its head.

This embryonic mouse is stained with Alizarin Red to visualize bones and Alcian Blue to visualize cartilage.

The cell in the center started out as a red blood cell like the others, but it has transformed into a "spur cell," probably because of the fixation technique used to capture this electron micrograph.

A harvestman spider (Vonones ornata) grooms its left third leg.

A cortical neuron (green) against a background of neuronal stem cells (red)

This juvenile sea biscuit (Clypeaster subdepressus) uses its arms to move and to find food.

Mutated human vascular cells form a disorganized blood vessel network when transplanted into immunocompromised mice.

The colors superimposed on the head of fossilized spider relative Alalcomenaeus reveal copper in blue, iron in magenta, and the outline of the arthropod's nervous system in green.