This is a scanning electron micrograph of a Steinernema carpocapsae nematode; this is what they look like when they are spitting venom into their host.

This image shows two different Toxoplasma host cells changing their shape to migrate.

A section of mouse brain stained to identify individual neurons and all their connections. Each color represents a different DNA barcode.

A cross-section of a mouse brain reveals some of the regions involved in the choice between social approach and avoidance.

Microscopy of spinal cord sample from a mouse model of neurodegeneration.

This image shows a male sexual polyp of the cnidarian Hydractinia symbiolongicarpus, a species of water-residing animals.

Zebrafish are a useful model for studying the development of blood cells and blood vessels. This image shows blood cells (magenta) in blood vessels (yellow) on the yolk of an anesthetized, 2-day-old, transgenic zebrafish embryo, which is about the size of a grain of rice.

An organ of Corti from a one-day-old mouse, showing sensory hair cells in green, supporting cells in purple, and cell nuclei in blue.

Some corals are particularly light-sensitive, making them difficult to image. In this case, darkfield imaging has been used to reveal the non-autofluorescent coral tissue in the Northern Star coral, a species with no intrinsic fluorescence.

This is an image of mouse astrocytes showing the actin cytoskeleton (red) and lysosomes (green). The cells are preparing for autophagy after experiencing osmotic stress.