slackingoff2017 8 days ago [-]
Another crown phenomenon https://en.m.wikipedia.org/wiki/Krummholz

And something that prevents many trees from being grown indoors https://en.m.wikipedia.org/wiki/Reaction_wood

Trees will lead you down a glorious wikipedia black hole.

raldi 8 days ago [-]
What does reaction wood have to do with growing plants indoors?
adventured 8 days ago [-]
There's typically no wind indoors.

http://awesci.com/the-role-of-wind-in-a-trees-life/

nayuki 7 days ago [-]
You could say that you go down a tree of exploration on Wikipedia. https://xkcd.com/214/
mrout 7 days ago [-]
Why is Wikipedia incapable of seeing that I'm on a desktop computer from my User-Agent and redirecting me to the desktop site? Gah!
donatj 7 days ago [-]
This is super interesting. This is the kind of thing I enjoy on HN most, oddly.
zone411 7 days ago [-]
You might want to check out "The Hidden Life of Trees: What They Feel, How They Communicate" by Peter Wohlleben. It's an enjoyable book that covers similar topics, also available as an audiobook.
tptacek 8 days ago [-]
Perhaps somebody else here listens to the Slate politics podcast, where John Dickerson this week spent 4 minutes describing this phenomenon.
Houshalter 7 days ago [-]
There was a bunch of popular posts about it on reddit yesterday. I would bet that is probably the most direct source of this post. Perhaps the podcast inspired the original reddit posters.
tptacek 7 days ago [-]
That's kind of even cooler, the idea that a 4 minute bit Dickerson did about tree growth patterns could spread so virulently.
tedunangst 7 days ago [-]
unsupported 7 days ago [-]
deerpig 7 days ago [-]
I heard it on the Gabfest before seeing it here as well.
andirk 7 days ago [-]
or Slate politics podcast reads Hacker News via the future, steals their thunder
raldi 8 days ago [-]
Apropos of what?
tptacek 7 days ago [-]
Nothing? It's just interesting to think about.
roceasta 8 days ago [-]
>Plants are able to sense the proximity of neighbors by sensing backscattered far-red (FR)

Plants can see? I had no idea.

Mz 8 days ago [-]
They also can "scream" by giving off a pulse (that humans can't hear) when attacked and can "talk" to each other by giving off chemicals when attacked by insects, thereby warning neighboring relatives to start creating protective chemicals to defend themselves.
thomasfoster96 7 days ago [-]
> They also can "scream" by giving off a pulse (that humans can't hear) when attacked...

Do you have a source for the ‘scream’ phenomenon?

I am aware of (and was myself misled by) several pop-science books which confusingly tried to compare plants giving off chemicals when attacked with animals screaming. The result was that a skim read would have given one the impression that plants could make sounds inaudible to humans, which was not what was meant.

Mz 7 days ago [-]
Sorry, no. It was in a textbook from a college class some years ago. I no longer have the textbook and can't tell you more than that.
yorwba 7 days ago [-]
Trees who suffer from drought apparently give off ultrasound when their dried cells are destroyed, but it seems to attract pests who then finish off the tree: https://www.thefreelibrary.com/Pop+chirp+bite+crunch+chew%3a...
thomasfoster96 7 days ago [-]
But that's the sound of the tree decaying/dying, not communicating as the GP seemed to imply.
wybiral 7 days ago [-]
I will never again feel safe in the woods.
Mz 7 days ago [-]
I stopped obsessing about the supposed morality of eating meat after I learned these things. Just because you can't hear your veggies scream doesn't mean they aren't suffering.

(There are lots of really good reasons to limit meat consumption. But, the touchy-feely appeal to "think about the suffering of the animals" is species-ist (for lack of a better word).)

ocb 7 days ago [-]
This is getting very off topic, but I think that's a terrible basis for disregarding the ethical argument against eating meat. Why is it "species-ist" to think that mammals and other animals with highly developed nervous systems might have a conscious experience similar to our own (and not plants)?
joaomacp 7 days ago [-]
MEOW MEOW MEOW MEOW

Oh sorry my cat just wanted to comment on this. Hope it doesn't get downvoted for not being relevant, because he has a 'conscious experience similar to our own'...

harryjo 7 days ago [-]
The same argument leads a rational person to stop obsessing about the supposed morality of killing humans. The touchy-feely appeal to "think about the suffering of the _humans_" is likewise species-ist
jpttsn 7 days ago [-]
So the rational path takes us to a horrible conclusion. Are you saying it's time to throw out rationality?
qguv 7 days ago [-]
I think they're saying that you may have thrown out the baby with the bathwater. If your conclusion horrifies you—doesn't resemble what you were optimizing for—you may be optimizing for the wrong thing. Rationality isn't broken; revisit your optimization criteria. See the paperclip optimizer, the smiles optimizer, etc.
magic_beans 8 days ago [-]
Wow! The gaps look extraordinary. What a weird thing to learn about today!
andirk 7 days ago [-]
Looks cool, but didn't you learn that we don't know?
nebabyte 7 days ago [-]
He didn't say anything to the contrary.
wyldfire 8 days ago [-]
What an interesting phenomenon! Thanks for sharing.
colordrops 8 days ago [-]
Not sure why but this phenomenon is extremely pronounced while tripping on LSD.
arkis22 7 days ago [-]
An easy answer would be that everything is more pronounced while tripping on LSD
randyrand 7 days ago [-]
the absence of the phenomenon is not more pronounced.