Content by The Scientist

The skipper butterfly caterpillar (Pyrrhopyge thericles) is toxic to predators because it feeds on poisonous Vismia plants.

This time-lapse micrograph shows marine bacteria (blue) feeding on a decaying ocean diatom (silver, 0.1 mm long).

Honeybee larvae (left) hatch from eggs (right) in their cells approximately three days after being laid.

The developing flowers on the tip of this Arabidopsis thaliana contain cells of varying sizes (cell nuclei and plasma membranes in green; chloroplasts in red).

The red color of Antarctica’s Blood Falls is caused by iron in the water trapped under the Taylor Glacier.

This image of a mouse retina displays a branching blood vessel (blue) amid glial cells (green), neuron cell bodies (orange), and their optic nerve fibers (red).

Seeds from the critically endangered Japanese birch (Betula chichibuensis) germinated last month for the first time in nearly 30 years at Bedgebury National Pinetum in the United Kingdom.

A bacterial infection in their tails causes these Caenorhabditis elegans (green) and Pristionchus pacificus (grey) nematodes to stick together until they die.

This family of moose is an example of the wildlife thriving in the Chernobyl Exclusion Zone, the site of a 1986 nuclear accident.

The fluid trail (blue) left by an ant may act as a lubricant, helping the insect lift its adhesive feet while walking.

This progression depicts the Australian crow butterfly (Euploea core) from caterpillar to chrysalis after 12 hours, 24 hours, 48 hours, and upon emergence.

This micrograph shows liver cells (red) infiltrated by inflamed adipose tissue (white) and crisscrossing fibrotic strands (blue).

In corn snake (Pantherophis guttatus) embyros like this one, genes once associated exclusively with limb development are now known to play roles in developing external genitalia.

This middle Eocene sunfish (Priscacara) was collected from Wyoming in 1984.