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Functional Vision in the Dark

No.2853038 View ViewReplyOriginalReport
Everyone post your tips, tricks, and knowledge about how to best see in the dark, and how to best utilise your scotopic vision.

This includes discussion of lighting and how to best use it, and IR/thermal/nacht vision options.

I'll start:
Your scotopic (night) vision takes about 20mins to reach highly effective performance, and up to an hour to reach peak performance - so it's important that you preserve it!

Facts about your vision that you can use to your advantage:
>your eye has two main types of photoreceptors: cones and rods.
>cones are sensitive to colour and most of your fine detail relies on them, they are NOT sensitive to contrast or movement
>rods are sensitive to contrast and very sensitive to movement, they see ONLY contrast: dark vs. light and never in fine focus.
>cones are grouped in the centre of your retina, directly behind your pupil and lens
>rods are non-existent in the centre of your retina, but are spread around the outside, off-axis from your cornea, making survival possible because it is your peripheral vision that you rely on for reflex if anything suddenly moves in on you
>in scotopic vision your cones fail and you rely entirely on your rods, this is why in low light everything looks grey or black & white
>this also means in the dark anything you try to stare directly at (if you think something is lurking out there in the moonlight) you won't be able to see, you're basically blind to anything you stare at
>look away slightly, using your peripheral (rod) vision and even though you couldn't read a chart you will get more information and immediately identify if something is moving

cont'd
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No.2854429 View ViewReplyOriginalReport
would a solo alpine winter ascent of K2 without oxygen be a greater feat than free soloing El Capitan?
10 posts omitted

No.2857218 View ViewReplyOriginalReport
Life after 30 is a slow-motion suicide without family. It's all the negatives of getting old; watching your friends drift away as they start their own families, your parents and siblings getting old and die, watching everything in your life slowly putter out as the magic fades; without any of the positives of things like family or community to shore you up. Everything rots away and you're left with the bleakness of oblivion, no hope of anything continuing. Anyone who has experienced considerable ageing among his family members (or already in himself), knows how blackpilling it is. It's really rough, once people pass their early 50s (or sometimes even sooner) you start to notice the slip-ups, forgetfulness, the declining of fine motor skills, the difficulties understanding new information. Human existence is a tragedy, there are so few years that you are allowed with full mental and physical strength. Your peak years are mostly wasted with education, where you have barely any control over your own life, because you have little to no money nor autonomy. Add to that the time spent sleeping, working, hygiene, housework, shopping, appointments, visits to the workshop - what do we have left? Everyone who has to work for a living basically leads a precarious existence, regardless of whether they are a simple worker or a well-paid employee. Before they have built up a comfortable fortune and a well established understanding of the world, the body goes downhill.
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No.2857181 View ViewReplyOriginalReport
Google claims this is a real story. Do a reverse image search and see if you can convince it otherwise.

Eco-Autarky: Resources Into Products

No.2856990 View ViewReplyOriginalReport
Explanation: What Is Eco-Autarky?
An eco-autarky loop, otherwise known as eco-autarky, is a self-sufficiency system with strong emphasis on ecological principals, independence from industrial supply chains, and minimum waste. Eco-autarky loops go a step beyond traditional economic autarky (self-sufficiency).
Eco-autarky loops (through all-natural, low-impact regenerative methodology) result in the production of essential resources using renewable biological processes, easily acquirable resources and closed-loop systems. Each stage of an eco-autarky loop may provide useful byproducts.

Example: Eco-Autarkical Disinfectant Cleaner
The following eco-autarkical closed-loop system results in an all-natural disinfectant cleaner from excess harvested/wasted fruit/plant material, producing useful byproducts throughout 5 stages of production.

Stage 1: Harvest or collect apples, pears, grapes, berries, peaches and/or sugar-rich roots (beets, carrots) in your garden or food forest. Use windfalls, overripe fruit, peels, cores - anything that would normally become waste.
Stage 2: Alcoholic Fermentation (Yeast Phase) - Crush/chop the harvest to make a simple fruit mash or juice. Add yeast to the fruit juice then ferment in a jar/bucket for 1-3 weeks.
Byproductive result: fruit wine or hard cider
(1/2)
18 posts and 5 images omitted

Water Slide Meme.

No.2857173 View ViewReplyOriginalReport
I hope this is the right place to put this, since I am very new here. Recently I've been seeing this meme about someone getting ripped open by a nail sticking out of an at home water slide, the tarp ones you set up with a sprinkler, and now I've been thinking, I need to see absolutely any example of this happening, it just sounds too bloody for me not to want to see.

No.2855436 View ViewReplyOriginalReport
Any tips for off trail hiking? I pretty much covered all trails at my go to out location but there's still plenty of unexplored land and terrain to hike on but I'll have to find my way through dense scrubland and hilly/rocky terrain.
I'm in pretty good shape and have all the gear since I already day hike at least a couple times a week(15 or so miles).
14 posts and 1 image omitted

Conservation general

No.2837495 View ViewReplyLast 50OriginalReport
why does it seem like all you people want to go out and be “in le nature” but don’t give a single fuck about preserving ecosystems or native biodiversity? You feel entitled to go out and be in nature and treat it like your personal fucking playground, damaging the ecosystem and demanding roads and trails be paved through the wilderness so you can “heckin enjoy it”? And then go home and continue to fuel the 6th mass extinction with your destructive consumerist habits?
Anyway, I planted some Texas native wildflowers today to help the declining pollinator population in my area. What did you do?
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Strange encounter with creep in the snow, did I do the right thing?

No.2856882 View ViewReplyOriginalReport
>Time is 1:42am in the UK
>Actual snowstorm covering my town
>Decide "Hey I'm a fat autistic POS, lets go for a walk since snow is cool"
>Gear up in boots and scarf with gloves ready for a nice hour long walk

So there I am walking up a hill enjoying the peace and scenery. I am a fat mid twenties male so I am not really expecting what happens next. I see over the crest, a man walking in the middle of the road towards my direction. I think nothing of it because why the fuck is anyone dodgy going to be out at this time? So I continue walking up the hill thinking nothing of it. As we get closer to eachother he sneakily starts walking onto the pavement in front of me.
I'm a bit weirded out at this point so I go "Alright mate?" as a friendly gesture. He doesn't respond, I call again and he still doesn't respond. Might be my imagination but I swear he was walking brisker at me.

Now I am really pissed off what I did next because I ran like hell. It's almost 2am, the roads are dead and its just me and him, I've never had a proper fight in my life and all I'm thinking in my head is "GUY HAS A KNIFE AND IS PROBABLY A MIGRANT". I am a fat bastard but somehow the adrenaline made me speed away faster than I've ever known. Despite the snow I didn't slip. So what the fuck was the guy's problem? Why did he start walking on the pavement only when we were crossing paths? My town isn't known for things like this but occasionally it does happen. I'm just so pissed off man because I feel like a coward. Still thats the most running I've done in years so I was coughing my lungs up for 10 minutes after.

Maybe I should join a boxing gym.
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No.2857075 View ViewReplyOriginalReport
Any /spear/ bros? I was hiking pretty remotely on some old Indian trails along the river in central texas and happened upon some hogs. Wasn’t the first time this has happened either. I have no interest in hunting but I’m considering buying one to carry for defense if one decided to charge me next time and i don’t have a cliff or tree to retreat to. it seems like it would be pretty handy to have around as it was the most effective weapon in general before projectiles were invented
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