this post was submitted on 21 Feb 2026
263 points (99.6% liked)
Science Memes
19196 readers
2376 users here now
Welcome to c/science_memes @ Mander.xyz!
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.
Rules
- Don't throw mud. Behave like an intellectual and remember the human.
- Keep it rooted (on topic).
- No spam.
- Infographics welcome, get schooled.
This is a science community. We use the Dawkins definition of meme.
Research Committee
Other Mander Communities
Science and Research
Biology and Life Sciences
- !abiogenesis@mander.xyz
- !animal-behavior@mander.xyz
- !anthropology@mander.xyz
- !arachnology@mander.xyz
- !balconygardening@slrpnk.net
- !biodiversity@mander.xyz
- !biology@mander.xyz
- !biophysics@mander.xyz
- !botany@mander.xyz
- !ecology@mander.xyz
- !entomology@mander.xyz
- !fermentation@mander.xyz
- !herpetology@mander.xyz
- !houseplants@mander.xyz
- !medicine@mander.xyz
- !microscopy@mander.xyz
- !mycology@mander.xyz
- !nudibranchs@mander.xyz
- !nutrition@mander.xyz
- !palaeoecology@mander.xyz
- !palaeontology@mander.xyz
- !photosynthesis@mander.xyz
- !plantid@mander.xyz
- !plants@mander.xyz
- !reptiles and amphibians@mander.xyz
Physical Sciences
- !astronomy@mander.xyz
- !chemistry@mander.xyz
- !earthscience@mander.xyz
- !geography@mander.xyz
- !geospatial@mander.xyz
- !nuclear@mander.xyz
- !physics@mander.xyz
- !quantum-computing@mander.xyz
- !spectroscopy@mander.xyz
Humanities and Social Sciences
Practical and Applied Sciences
- !exercise-and sports-science@mander.xyz
- !gardening@mander.xyz
- !self sufficiency@mander.xyz
- !soilscience@slrpnk.net
- !terrariums@mander.xyz
- !timelapse@mander.xyz
Memes
Miscellaneous
founded 3 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Exactly! I’ve said this for years, every time the meme comes up. I’m saying it right now to anyone nearby.
I mean, I have no real basis to know if canopy friction is the reason or not but I’m saving this post as support of my confirmation bias anyway.
It’s sort of how trees don’t have limbs lower than the height of a box truck along major roads.
Not really. Along most major roads, if trees are close enough to even potentially be a problem, they will be trimmed by road crews.
It's not because they get hit by trucks, it's because they're deliberately trimmed back to keep the road clear.
So trees have evolved truck-sensing organs in the span of mere decades? Unbelievable!
I know you're joking but it's really survival of the fittest.
Branches that are too low and get hit by trucks don't grow very far into the road.
Apparently that's the leading theory, but another is just that for reasons I am absolutely unqualified to explain, they sense light in specific ways that causes them to grow differently once they get close enough to another tree blocking some of the light there.
Like a houseplant angling toward the window light?
A little, the stretching house plant demonstrates how plants can sense the direction light is coming from. They can also sense qualities of light. They can tell if light is filtered through other leaves, for instance. I would speculate that refected light also has a unique color (wavelength) distribution that a plant could sense and respond to
Terms like "sense" and "tell" are a bit misleading. It's very much a chemical/mechanical interaction that's automatic. Rather like soap bubbles "sensing" when they've reached the surface of the water.
Plants contain a protein called phototropin, which is activated by light. When it's activated, it changes the shape and alignment of the "skeleton" of the cell, making it more cube-shaped as opposed to long and skinny.
That means the light side of a plant gets shorter, while the dark side remains long. The dark side also grows slightly faster, on a count of having more cells there (you can fit more skinny cells side-by-side than wide cells), and so the plant angles and grows toward the light.
I mean, so are our sense before being processed by the brain.
It seems as far as we can tell, trees can detect "far red" spectrum light, suspected to be done via phytochromes, and that spectrum of light is in higher quantities when closer to other tree leaves because it gets reflected off.
They detect that, and don't grow as much in that direction since it would cause diminishing returns.
The reflected light of other leaves wouldn’t cause photosynthesis since it only has wavelengths that the chloroplasts reflect. They wouldn’t have any light to absorb, or at least a lot less.
I imagine it’s like expecting regular soda and getting diet.