One approach to understanding the brain is to reconstruct the shapes and connections of individual neurons.
A group of 14 stink bug eggs attached to the underside of a poplar leaf.
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An intricate three-dimensional network of blood vessels nourishes the heart.
Sponges feed themselves through chambers of specialized cells.
The golden birdwing provided a striking clue to the natural origin of species.
The developing brain needs a constant source of new cells as it builds the circuits that will control behavior.
Many animals have a third eyelid called a nictitating membrane that protects the eye.
The eye of a chimpanzee views the world in living color.
The young starlet sea anemone forms tentacles by cell division, migration, and shape changes.
The fins of the scalyhead sculpin are related to our arms.
Tiktaalik roseae, also known as the “fishapod,” is an animal that lived about 375 million years ago, with features of fish and four-legged animals.
The Cape Cliff lizard sports a bony body armor.
The shape of our hands comes from tree-dwelling ancestors.
... but that's not all they'll do. Several genes determine the diverse shapes and functions of crustacean appendages.
Female peacock spiders stay with their young in an egg sac until they can fend for themselves.
Chromosomes change form as a cell divides to ensure that each daughter cell gets a full, intact copy of the genome.
The human immunodeficiency virus (HIV) is discovered “hiding” between the cells of the gut.
The arrangement of cells in the retina reveals how it detects, processes, and relays visual information to the brain.
The male peacock spider performs a spectacular dance to attract a mate—but the female is not always impressed.
A 3D model of the dengue virus reveals a shape like a soccer ball with an outer coating of glycoproteins.
A unique group of cells in the eye’s retina specifically detects the upward motion of objects, such as a ball thrown in the air or…fireworks.
A weekly image selected from the striking imagery produced every day by scientists around the world.
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Guidelines and submission terms for Image of the Week submissions.