Bubbles Encased in Ice
If you've ever made ice in a freezer, you've probably noticed the streaks of frozen bubbles inside the ice. In its liquid state, water is good at dissolving various gases -- like the carbon dioxide in sparkling water. (Image credit: J. Meijer and D. Lohse; via GoSM)
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How Moths Confuse Bats
When your predators use echolocation to locate you, it pays to have an ultrasonic deterrence. So, many species of ermine moths have structures on their wings known as tymbals. (Image credit: Wikimedia/entomart; research credit: H. Mendoza Nava et al.; via APS Physics)
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Drops of Fiber Suspensions
To 3D print with fiber-infused liquids, we need to understand how these drops form, break-up, and splash. That's the subject of this research poster, which shows drops of a fiber suspension forming and pinching off along the top of the image. (Image credit: S. Rajesh and A. Sauret; via GoSM)
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"Ferro Field"
Ferrofluid forms a labyrinth of blobs and lines against a white background in this award-winning photo by Jack Margerison. Ferrofluids are a magnetically-sensitive fluid, typically created by suspending magnetic nanoparticles in oil. (Image credit: J. Margerison from CUPOTY; via Colossal)
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Floating in Sync
Objects on a vibrating liquid bath can interact with each other through the waves they make as they bounce. Here, researchers look at three-armed spinners interacting in pairs and in larger groups. (Video and image credit: J. Barotta et al.; via GoSM)
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Mimicking Plant Movement
Many plants control the curvature of their leaves by selectively pumping water into cells that line the outer surface. This swelling triggers bending. Engineers created their own version of this structure. (Image credit: T. Gao et al.; via GoSM)
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The Channel Tunnel
To celebrate the 30th anniversary of the Channel Tunnel, Practical Engineering takes a look back at the construction and operation of this incredible piece of infrastructure. (Image and video credit: Practical Engineering)
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Reapproaching Supersonic Air Travel
Before the Concorde even began regular flights, protests over its sound levels caused the U.S. and many other countries to ban overland commercial supersonic flight. Those restrictions have stood for fifty years. (Image credit: NASA; via Physics Today)
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"Color Show"
Brightly colored paints and inks mix and flow in artist Roman De Giuli's "Color Show." De Giuli typically creates this fluid art in thin layers atop paper. (Video and image credit: R. De Giuli)
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Dendritic Painting Physics
In the art of Akiko Nakayama, colors branch and split in a tree-like pattern. In studying the process, researchers found the physics intersected art, soft matter mechanics, and statistical physics. (Image credit: A. Nakayama; research credit: S. Chan and E. Fried; via Physics World)
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Visualizing Wingtip Vortices
At the ends of an airplane's wings, the pressure difference between air on top of the wing and air below it creates a swirling vortex that extends behind the aircraft. In this video, researchers recreate this wingtip vortex in a wind tunnel, visualized with laser-illuminated smoke. (Video and image credit: M. Couliou et al.)
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Stomp It Out
Drop a ball that's partially filled with water and it may or may not bounce. Why the difference? It all comes down to where the water is before impact. (Video and image credit: A. Martinez et al.; research credit: K. Andrade et al.)
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"Mason Bee at Work"
Mason bees like this one build landmarks to help them navigate as they construct a shelter for their eggs. Even hauling materials, these bees can easily stay aloft. (Image credit: S. Zankl; via Wildlife POTY)
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"Nimbus"
Ephemeral clouds drift through unusual places in artist Berndnaut Smilde's works. He creates his clouds from smoke and water, launching them for a matter of seconds before they dissipate. (Image credit: B. Smilde and collaborators; via Colossal)
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Simeis 147
Sometimes known as the Spaghetti Nebula, Simeis 147 is the remnant of a supernova that occurred 40,000 years ago. The glowing filaments of this composite image show hydrogen and oxygen in red and blue, respectively. (Image credit: S. Vetter; via APOD)
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Light Pillars
These lovely pillars of light over the Mongolian grasslands are the result of tiny, suspended ice crystals. (Image credit: N. D. Liao; via APOD)
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Lasers and Soap Films
Soap films are a great system for visualizing fluid flows. Researchers use them to look at flags, fish schooling and drafting, and even wind turbines. In this work, researchers explore the soap film's reaction to lasers. (Image and research credit: Y. Zhao and H. Xu)
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