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Image of the Day

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image: Image of the Day: Self-Cleaning Trachea

Image of the Day: Self-Cleaning Trachea

By | May 1, 2013

Cells covered in tiny, hair-like cilia clear foreign substances from the respiratory tract.

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image: Image of the Day: Acrobatic Damselflies

Image of the Day: Acrobatic Damselflies

By | April 30, 2013

During mating, a male damselfly holds a female behind her head while she loops her abdomen forward to pick up sperm that he has deposited in a secondary sexual organ.

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image: Image of the Day: Juvenile Sea Star

Image of the Day: Juvenile Sea Star

By | April 29, 2013

A sea star just after metamorphosis from its larval form.

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image: Image of the Day: Fairyfly

Image of the Day: Fairyfly

By | April 26, 2013

The chalcid wasp species Kikki huna is smaller than a grain of salt and has thin wings with long bristles at their ends.

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image: Image of the Day: Hijacked Immune Cell

Image of the Day: Hijacked Immune Cell

By | April 24, 2013

An HIV-infected dendritic cell shoots out thin projections called filopodia (red) with virus particles (white) at their ends.

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image: Image of the Day: Aggressive Posture

Image of the Day: Aggressive Posture

By | April 23, 2013

After someone tried to move this Namib desert-dwelling chameleon off a roadway, it opened its mouth wide in a threat display.

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image: Image of the Day: Sword-Billed Hummingbird

Image of the Day: Sword-Billed Hummingbird

By | April 22, 2013

This South American hummingbird uses its long beak to sip nectar stored deep inside flowers.

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image: Image of the Day: Magnified Moss

Image of the Day: Magnified Moss

By | April 19, 2013

Chloroplasts are visible within cells of the forest-growing moss Plagiomnium affine.

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image: Image of the Day: Chromosome Map

Image of the Day: Chromosome Map

By | April 18, 2013

Chromosomes in a fibroblast's nucleus during the resting stage of the cell cycle are individually labeled with fluorescent tags.

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image: Image of the Day: Spiky Surface

Image of the Day: Spiky Surface

By | April 17, 2013

This scanning electron micrograph of a leaf's epidermis features stoma shaped like small mouths for gas exchange and hair-like structures called trichomes.

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