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Image of the Day

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image: Image of the Day: Kaleidoscopic Stalk

Image of the Day: Kaleidoscopic Stalk

By | August 2, 2013

Vascular bundles in this cross section of a dahlia flower stalk help the plant distribute water and nutrients to its tissues.

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image: Image of the Day: Visualizing Death

Image of the Day: Visualizing Death

By | August 1, 2013

Intestinal cells in Caenorhabditis elegans emit blue fluorescence in a wave from head to tail as the worm dies.

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image: Image of the Day: Stressed Out Algae

Image of the Day: Stressed Out Algae

By | July 31, 2013

The algal species Haematococcus pluvialis produces the red pigment astaxanthin when subjected to environmental stressors, such as low nutrient availability.

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image: Image of the Day: Gastric Rainbow

Image of the Day: Gastric Rainbow

By | July 30, 2013

This section through a mouse stomach shows where food is digested (black area near the top) by enzymes and acids made by the green and magenta cells, respectively, while the red cells lining the stomach's surface secrete mucus to protect the stomach from self-digestion.

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image: Image of the Day: Bug's Life

Image of the Day: Bug's Life

By | July 29, 2013

A new study on the gut microbiome of closely related wasp species in genus Nasonia provides evidence for the controversial hologenomic theory of evolution, which states that the genomes of both a host and its microbial symbiotes contribute to host speciation.

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image: Image of the Day: Caught in the Net

Image of the Day: Caught in the Net

By | July 26, 2013

This 2-day-old zebrafish heart tube shows muscle cells (green) and other components of the muscle (red and blue).

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image: Image of the Day: My Schwannoma

Image of the Day: My Schwannoma

By | July 25, 2013

Differential interference contrast microscopy captured these images of schwannomas, benign tumors of Schwann cells, which insulate nerves in the periphery of the body with fatty myelin sheaths.

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image: Image of the Day: Orange Pore Fungus

Image of the Day: Orange Pore Fungus

By | July 24, 2013

The orange pore fungus (Favolaschia calocera), native to Madagascar, grows on decaying plant matter in forests.

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image: Image of the Day: Flashy Fluorescent Fish

Image of the Day: Flashy Fluorescent Fish

By | July 23, 2013

Neurons in a larval zebrafish are distinguished using the Brainbow method, in which different ratios of a handful of colored fluorescent proteins are expressed randomly to give each neuron a unique hue.

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image: Image of the Day: Made-to-order Heart

Image of the Day: Made-to-order Heart

By | July 22, 2013

Inside a bioreactor, the cells of a human heart are washed away by detergents, leaving a protein scaffolding that can then be injected with heart-muscle precursor cells.

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