Image of the Day

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image: Image of the Day: Fertilization Fireworks

Image of the Day: Fertilization Fireworks

By | May 3, 2016

A "zinc spark," triggered when an enzyme from a sperm activates a human egg cell, is imaged using fluorescence microscopy and visualized here as a wave of light.

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image: Image of the Day: Stay Back!

Image of the Day: Stay Back!

By | May 2, 2016

A male jumping spider (Servaea incana) lunges at an opponent, who promptly flees off camera.

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image: Image of the Day: Water World

Image of the Day: Water World

By | April 29, 2016

Three orbicular batfish (Platax orbicularis) swim through mangrove roots off Raja Ampat, Indonesia.

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image: Image of the Day: Glowing Skin

Image of the Day: Glowing Skin

By | April 28, 2016

The chain catshark (Scyliorhinus rotifer) can adjust the contrast in its biofluorescence patterning, potentially aiding communication with other members of its species.

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image: Image of the Day: Tanzanian Twists

Image of the Day: Tanzanian Twists

By | April 27, 2016

These planktonic protist fossils, found in cores drilled in sediments in East Africa, are about 40 million years old.

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image: Image of the Day: Plastic Pumps

Image of the Day: Plastic Pumps

By | April 26, 2016

This artificial lung mimics the human pulmonary response to drugs, toxins, and other agents.

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image: Image of the Day: Star Light

Image of the Day: Star Light

By | April 25, 2016

Many species of coral display fluorescence, and these green star polyps (Briareum violaceum) are no exception.

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image: Image of the Day: Knowing Your Place

Image of the Day: Knowing Your Place

By | April 22, 2016

Floodplain-dwelling Formica selysi ants, marked here with paint to tell them apart, assume specialized positions to form rafts in the event of a flood.

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image: Image of the Day: Keeping Watch

Image of the Day: Keeping Watch

By | April 21, 2016

Intestinal epithelial cells (orange) surround immune surveillance cells called M cells (purple) in this colored micrograph of murine gut tissue.

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image: Image of the Day: Origin Story

Image of the Day: Origin Story

By | April 20, 2016

Gill arches, situated below the eyes in this skeletal preparation of a late-stage little skate (Leucoraja erinacea) embryo, may provide clues about limb evolution in tetrapods.

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