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A video of an odd, swaying plant mystified the Internet this past weekend. Two clips posted to YouTube by user jethack show a fairly large leafy protrusion vigorously bouncing side-to-side, seemingly of its own accord. It doesn't look like there's wind blowing any of the other leaves nearby, but a commenter speculated it's probably just a closed palmetto frond that can catch any slight breeze and go crazy
Originally posted by CaptainBeno
Ummm aerodynamics? Bernoulli effect? High and low pressure.............Lift?
There is your explanation.
It's swaying in the breeze aided by this effect.
This is the answer I came here to post. Look at the flora in the background moving in the light breeze. When he zooms in on the plant, you can see the leaf has been bent convexly, thus creating a rounded foil. The light breeze is simply spilling off the sides of the foil, and when the plant gets "blown" all the way to one side, the stem of the plant torques and the foil faces the other way. This allows the air to be spilled off the opposite side, pushing the plant in the other direction. Repeat that process over and over and you get a "waving plant". The same general principle dictates why a flag flutters back and forth.
Originally posted by iamhobo
This is the best answer I can find as to why. From a post on reddit.
This is the answer I came here to post. Look at the flora in the background moving in the light breeze. When he zooms in on the plant, you can see the leaf has been bent convexly, thus creating a rounded foil. The light breeze is simply spilling off the sides of the foil, and when the plant gets "blown" all the way to one side, the stem of the plant torques and the foil faces the other way. This allows the air to be spilled off the opposite side, pushing the plant in the other direction. Repeat that process over and over and you get a "waving plant". The same general principle dictates why a flag flutters back and forth.
Originally posted by kimish
This was posted the other day and I believe that we came to the conclusion that its from a gopher or mole underground that is running into the roots.
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