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A tiny animal appears to hitch a ride on a worm. The “water bear riding a worm” is real footage: Quinten Geldhof’s fifth-place entry in Nikon’s 2024 Small World In Motion competition, titled “A baby tardigrade riding a nematode.” The joke is instantly legible, but the clip also reveals how specialized microscopy can turn organisms invisible to the naked eye into cinematic subjects.
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What the “water bear riding a worm” actually shows
The rider is a baby tardigrade, commonly called a water bear. Its mount is a nematode, the precise scientific term for a microscopic roundworm. In everyday language, “worm” is understandable; “nematode” identifies the animal more accurately.
The video does not show a trained stunt or an animation. It records one microscopic animal moving while attached to or traveling on another. That unexpected scale relationship is why the image reads like a rodeo scene even though both animals are far too small to see unaided.
Tardigrades: the water bears
Tardigrades are microscopic animals found in habitats including moss, freshwater and soil. Their compact bodies and multiple short legs give them the familiar nickname “water bear.” A juvenile tardigrade can look especially striking under magnification because its movement becomes visible as a distinct, bear-like crawl.
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Nematodes: the worm
Nematodes are microscopic roundworms that live in soil and many other environments. They are not a single species but a large group of animals with varied lifestyles. In Geldhof’s footage, the nematode provides the moving surface that makes the tardigrade rides a nematode.
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Nikon’s Small World In Motion is a microscopic video microscopy competition that “recognizes proficiency and excellence in videos taken under the microscope,” according to Nikon in the 2024 winners coverage. The 2024 contest received 370 entries from 40 countries, as reported by New Atlas on September 21, 2024.
Geldhof’s baby-tardigrade video ranked fifth. It was not the overall winner, an important distinction when the clip is circulated as a viral image. The contest’s ranking reflects technical execution and visual communication across many kinds of specimens, not simply which scene has the funniest premise.
Rank #3
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How the featured videos differ
The entries make their impact in different ways. Some turn biological development or cellular activity into a process the viewer can follow; others rely on the surprise of seeing an insect or microscopic animal in motion. Imaging method matters as much as subject.
| Comparison | Baby tardigrade riding a nematode | Other featured entries |
|---|---|---|
| Biological subject | A juvenile tardigrade and a nematode roundworm | Examples included development, cells and insects; individual pairings were not stated in the available winners report |
| Imaging approach | The report identifies it as microscope video but does not state a specialized method for this entry | Featured work used methods including light-sheet microscopy, fluorescence and 20× magnification |
| Main visual effect | An improbable animal-to-animal ride that resembles a miniature rodeo | Three-dimensional structure, glowing labeled features, magnified motion or developmental change |
| Scientific payoff | Makes the interaction and locomotion of two tiny animals immediately understandable | Can expose internal structures, cell behavior or changes over time, depending on the specimen and method |
Why technique changes what viewers see
Light-sheet microscopy illuminates a thin plane of a specimen, allowing researchers to record optical sections while limiting illumination outside that plane. Fluorescence makes selected structures emit light so they stand out against a darker background. A 20× system enlarges detail enough for movement and anatomy to become legible, though magnification alone does not guarantee a clear or informative video.
These approaches explain why the contest footage looks unlike a casual view through a classroom microscope. Contrast, depth, illumination and focus are engineered around the specimen. The visual dazzle is a product of biology and imaging working together.
Rank #4
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Why the tardigrade clip is so memorable
A visual joke anyone can read
You do not need specialist knowledge to understand the composition: a small, many-legged creature is on top of a long, flexible animal. Once the labels are supplied, the ordinary “water bear riding a worm” description becomes a precise account of two unrelated microscopic animals sharing a moving scene.
Motion supplies the story
A still image could show the animals’ shapes, but motion establishes the ride. The nematode’s movement and the tardigrade’s position create direction, timing and apparent intention. That is why a short clip can feel narrative even without narration.
Surprise and evidence coexist
The footage is funny because the scale relationship is unexpected, yet it is also observational evidence of how these organisms move in their environment. The entertainment does not require inventing behavior that the video does not establish.
Best Value
- Factory sealed DVD
Can you see something similar at home?
A USB digital microscope is a practical starting point for inspecting moss, pond water or other samples. It can help you discover moving microorganisms and record basic video, but it should not be expected to reproduce award-level footage. The Nikon entries used professional systems and, in some cases, light-sheet or fluorescence techniques that a low-cost device does not provide.
A sensible beginner setup
- Use a USB digital microscope with adjustable illumination and a stable stand.
- Collect only samples you can legally and safely handle, such as a small piece of moss or a drop of pond water.
- Place a thin sample on a clean slide or transparent dish and avoid crushing it with the cover.
- Adjust focus and lighting gradually; excessive brightness can wash out transparent organisms.
- Record short clips rather than moving the sample constantly, so motion remains interpretable.
Finding a tardigrade, nematode or other organism is not guaranteed. A home microscope may reveal motion without resolving the anatomy clearly, and identifying a specimen to species requires expertise beyond a casual video.
The larger lesson from Nikon’s winners
The 2024 competition shows that compelling microscopy is not limited to spectacular equipment or rare animals. A strong entry connects a biological subject with an imaging method that makes its behavior visible. Development and cellular change reward time-lapse or fluorescence; transparent structures may benefit from optical sectioning; an unusual interaction, such as a baby tardigrade riding a nematode, can carry the story through motion and scale alone.
That combination is what makes the fifth-place clip endure. It delivers an immediate visual punch, then rewards a second look when you realize that the “rider” and “worm” are real microscopic animals, recorded rather than staged.
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