Nikon's Small World Contest: A Gallery of Beautiful Tiny Things

The winners of Nikon's Small World contest create a beautiful collection of brain-teasing images. We bet you can't guess what they are without reading the captions.
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The $3,000 first prize in Nikon's 2007 Small World competition goes to Gloria Kwon of the Memorial Sloan-Kettering Institute in New York. Kwon's composite image of a mouse embryo, captured in both visible and ultraviolet light, reveals the inherent biochemical differences between the embryo (fluorescent red) and its yolk sac (highlighter green).Gloria Kwon/Memorial Sloan-Kettering Institute, courtesy Nikon Instruments
Nikon's Small World Contest A Gallery of Beautiful Tiny Things
Michael Hendricks, National University of Singapore, courtesy Nikon Instruments, Inc.
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a thing or two about life in the bustling channels.

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Charles Krebs Photography courtesy Nikon Instruments
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Seventeenth-century British microbiologist Robert Hooke once famously turned his pioneering microscope on a drop of seawater to discover a menagerie of living creatures. Here, latterday countryman Peter Parks of Witney, Oxfordshire, has set the head of a sewing needle atop a bubble of water containing microplankton native to Australia's Great Barrier Reef.

Nikon's Small World Contest A Gallery of Beautiful Tiny Things
Charles Krebs Photography courtesy Nikon Instruments
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Michael Klymkowsky/MCD Biology/University of Colorado at Boulder courtesy Nikon Instruments
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Vera Hunnekuhl/University of Osnabrück courtesy Nikon Instruments
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Shamuel Silberman/Ramat Gan courtesy Nikon Instruments
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Stephen Nagy/Montana Diatoms courtesy Nikon Instruments
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Stephen Lowry/University of Ulster, Northern Ireland courtesy Nikon Instruments
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At 30x magnification, a spider's handiwork looks almost too complex to fathom. Could this intricate and delicate web, woven by a pirate spider to protect her case of eggs, come from the same crawly arachnid whose presence typically signals either a movie horror scene, Halloween decorations or a cue to get something to squash with?

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The stamen of a Mirabilis jalapa, also known as the "four o'clock marvel flower" of Peru, opens while magnified 125x by a confocal microscope.