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Nikon Small World microscopy contest 2022: Meet this year’s top 10 winners


This arresting image of the hand of an embryonic Madagascar giant day gecko took first place in the annual competition.
Enlarge / This arresting image of the hand of an embryonic Madagascar giant day gecko took first place in the annual competition.

The Madagascar giant day gecko (Phelsuma grandis) is a popular exotic pet, perhaps because it looks a bit like Geico’s beloved animated gecko mascot. Adults measure about 10 inches in length and are known for their bright green body color, augmented by a red stripe running from the nostril to the eye. They can lick their eyeballs (a way to keep them clean since the creatures lack eyelids). And, of course, they sport those well-known adhesive pads on their feet and hands—ideal for clinging to smooth vertical surfaces—that physicists find so fascinating.

Now we have a unique perspective on the gecko’s most famous appendage: a striking photomicroscopy image of an embryonic hand of Phelsuma grandis, courtesy of a Swiss graduate student, Grigorii Timin, at the University of Geneva and his advisor, Michael Milinkovitch. It’s the winning image in the 2022 Nikon Small World Photomicrography Competition, designed to highlight “stunning imagery from scientists, artists, and photomicrographers of all experiences and backgrounds from across the globe,” according to Nikon’s communications manager Eric Flem.

The first step in creating the winning image was to prepare the sample using whole-mount fluorescent staining of the tissue. And an embryonic gecko hand is actually quite a large sample (about 3 mm or 0.12 inches long) when it comes to high-resolution microscopy. So Timin painstakingly merged hundreds of images—300 tiles, each containing some 250 optical sections—together using image-stitching to create the final result. Those cyan sections highlight the nerves in the embryonic hand, while other colors highlight bones, tendons, ligaments, skin, and blood cells.

Here are the remaining top 10 winners of this year’s contest. You can check out the full list of winners, as well as several honorable mentions, here—89 in all, selected from thousands of submissions around the world.

Caleb Dawson of the Walter and Eliza Hall Institute of Medical Research in Melbourne, Australia:
Enlarge / Caleb Dawson of the Walter and Eliza Hall Institute of Medical Research in Melbourne, Australia: “Breast tissue showing contractile myoepithelial cells wrapped around milk-producing alveoli.”

Caleb Dawson

Satu Paavonsalo and Sinem Karaman, University of Helsinki, Finland:
Enlarge / Satu Paavonsalo and Sinem Karaman, University of Helsinki, Finland: “Blood vessel networks in the intestine of an adult mouse.”

Satu Paavonsalo & Sinem Karaman

Andrew Posselt, University of California, San Francisco:
Enlarge / Andrew Posselt, University of California, San Francisco: “Long-bodied cellar/daddy long-legs spider (Pholcus phalangioides)”

Andrew Posselt

Alison Pollack, San Anselmo, California: Slime mold (<em>Lamproderma</em>)
Enlarge / Alison Pollack, San Anselmo, California: Slime mold (Lamproderma)

Alison Pollack

Ole Bielfeldt, Macrofying Cologne, Germany:
Enlarge / Ole Bielfeldt, Macrofying Cologne, Germany: “Unburned particles of carbon released when the hydrocarbon chain of candle wax breaks down.”

Ole Bielfeldt

Jianqun Gao and Glenda Halliday, University of Sydney, Australia:
Enlarge / Jianqun Gao and Glenda Halliday, University of Sydney, Australia: “Human neurons derived from neural stem cells.”

Jianqun Gao & Glenda Halliday

Nathanaël Prunet, University of North Carolina at Chapel Hill:
Enlarge / Nathanaël Prunet, University of North Carolina at Chapel Hill: “Growing tip of a red algae.”

Nathanaël Prunet

Marek Sutkowski, Warsaw University of Technology, Poland:
Enlarge / Marek Sutkowski, Warsaw University of Technology, Poland: “Liquid crystal mixture (smectic Felix 015).”

Marek Sutkowski

Murat Öztürk, Ankara, Turkey:
Enlarge / Murat Öztürk, Ankara, Turkey: “A fly under the chin of a tiger beetle.”

Murat Öztürk



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