Lush And Delightful By Marek Boguszak

The Topography of Africa.

by eastofnowhere

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In their newest video, the Slow Mo Guys recreated one of my favorite effects: vibration-driven droplet ejection. For this, they use a Chinese spouting bowl, which has handles that the player rubs after partially filling the bowl with water. By rubbing, a user excites a vibrational mode in the bowl. Watch the GIFs above and you can actually see the bowl deforming steadily back and forth. This is the fundamental mode, and it’s the same kind of vibration you’d get from, say, ringing a bell. 

Without a high-speed camera, the bowl’s vibration is pretty hard to see, but it’s readily apparent from the water’s behavior in the bowl. In the video, Gav and Dan comment that the ripples (actually Faraday waves) on the water always start from the same four spots. That’s a direct result of the bowl’s movement; we see the waves starting from the points where the bowl is moving the most, the antinodes. In theory, at least, you could see different generation points if you manage to excite one of the bowl’s higher harmonics. The best part, of course, is that, once the vibration has reached a high enough amplitude, the droplets spontaneously start jumping from the water surface! (Video and image credits: The Slow Mo Guys; submitted by effyeah-artandfilm)

水華

water flower effect

（ oddlysatisfying さんのReddit. ）

Yemen.

Engineered robot interacts with live fish

via kurzweilai:

A bioinspired robot has provided the first experimental evidence that live zebrafish can be influenced by engineered robots — a step toward using autonomous robots in an open environment to protect endangered animals and control pest species. […]

[read more @kurzweilai & @iop] [paper] [image credit: G Polverino et al./Bioinspiration & Biomimetics]

Il maestro della trottola!!

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