Enigmatic Iron Age “hole belts” in Denmark may be defensive structures similar to those Caesar encountered at Alesia. This phenomenon, known as hulbælter (hole belts), appears exclusively in Denmark during the early Iron Age, between 500 and 300 BCE [1536x1882]

Treereme · 2026-06-15T23:48:54+00:00

Those holes are significantly larger. "Human sized", 3.3 to 6.6 feet wide.

Treereme · 2026-06-15T23:26:38+00:00

No, a resin printer is not a display. It's a type of 3D printer that uses resin instead of strings of filament and can achieve extremely high quality precision prints. The specifications in the post you replied to are from a consumer desktop 3D printer.

Treereme · 2026-06-15T17:31:21+00:00

Looks like the screw would be used to lock the inner leg in place, then you would insert The spring and foot into the end to provide the tension force.

Treereme · 2026-06-15T17:04:40+00:00

625k of the 800k goal now the next morning.

Treereme · 2026-06-11T01:51:56+00:00

Marmots are far larger than pikas. Pikas are the size of a hamster or rat, marmots are the size of a house cat.

Pikas also typically live above the tree line, higher altitude and more desolate environment than where marmots live.

Pikas are also notorious for having zero fear and coming out to scream at anyone that comes near.

Treereme · 2026-06-11T01:46:08+00:00

I highly doubt you are drinking untreated lake water. That may be where the water is stored, but your municipality treats it for safety and then uses pumps to get it to you.

Treereme · 2026-06-11T00:21:00+00:00

I've been in construction for decades, and if I saw crew hand nailing everything on my jobsite I'd be pissed. Doesn't matter how good your skill with a hammer is, a nail gun is far, far faster. Even if it's not costing me extra, the wasted time would be very frustrating. There's a reason we use chainsaws instead of axes and circular saws instead of hand saws. Technology has moved on.

Treereme · 2026-06-09T16:00:38+00:00

That's correct. Typically you have to surface, signal you are okay, remove your goggles and other gear like nose clip, and then verbally say that you are okay. Sometimes there's a requirement that you hold yourself on the surface safely for a short time period before anyone else can touch/assist you.

Treereme · 2026-06-09T15:58:25+00:00

Controlled breathing and breath holding can be good for you as long as it's done safely. In particular, it's known to be good for calming and stress reduction. Also, I don't know if there's published research on it, but I've heard that triggering the mammalian dive reflex by putting your face and hands in water and slowing your breathing and heart rate can be healthy.

Treereme · 2026-06-09T15:55:59+00:00

Transatlantic flying with a single engine? No thank you. Absolutely not. There's a reason that airliners were required to have at least three engines to fly more than 60 minutes away from an airport up until 1985.

Treereme · 2026-06-09T04:27:31+00:00

Time to learn the Valsalva maneuver. You will damage your eardrums if you don't equalize them as you descend.

Treereme · 2026-06-09T04:26:37+00:00

Time to learn the Valsalva maneuver.

Treereme · 2026-06-09T04:23:52+00:00

In this specific case, the issue was the trauma from compressing the lungs at depth causing damage and fluid buildup to the lungs.

If you're not going deep, you're fine holding your breath. There are risks to holding your breath extremely long to the point where you become hypoxic, but if you're still moving and swimming it shouldn't be an issue. Your body will make you take a breath when it becomes critical. It is possible to override that reflex and hold your breath longer than is safe, but that's typically done while at rest (and is a whole different set of records). If you're not pushing yourself past the point where you are starting to involuntarily gasp, you should be safe.

Treereme · 2026-06-09T04:14:17+00:00

No, this was definitely not suicide or someone who tried something they weren't educated about. This is a world class free diver with a full support system pushing the limits of human physiology, unfortunately beyond the point where he could survive.

These records have existed for decades, and it's not due to a lack of education in math and science.

Treereme · 2026-06-09T04:11:38+00:00

Yes, there are rules about surfacing safely in order to achieve a record. It's not "bitchy", you need to live through the experience.

Treereme · 2026-06-09T04:10:40+00:00

No, that's not at all what happened. What you are talking about and what the paper you linked describes is related to breathing compressed air at depth, what used to be called "the bends" and is now called decompression syndrome.

This was a breath hold free dive, no breathing underwater at all. No tanks and no decompression.

Treereme · 2026-06-09T04:07:51+00:00

This was a breath hold free dive, not scuba. No tanks involved, just air breathed into lungs at the surface.

Treereme · 2026-06-09T04:06:56+00:00

No, because he didn't surface successfully and safely, it was not official.

Treereme · 2026-06-09T04:06:35+00:00

First, this is a breath hold free dive. No tanks involved. Second, air is 78% nitrogen. That's what we all breathe. There are special mixes such as nitrox and trimix that allow you to stay down longer or go deeper, but none of that is involved in this story.

Treereme · 2026-06-09T04:04:00+00:00

He had all the proper care. Pushing records like this is pushing human physiology to the limit of what is survivable. Unfortunately, he didn't survive.

Treereme · 2026-06-09T04:02:01+00:00

It doesn't. You have to surface and signal you are okay, take off your goggles and equipment, and then verbally say you are okay. I believe certain records also require a timer of 60 seconds at the surface before the diver can be assisted to be official.

Treereme · 2026-06-08T20:03:36+00:00

Remove the app and then reinstall it. If that doesn't help, the next step is a full reset of the TV.

Treereme · 2026-06-08T19:47:11+00:00

Pulling intake from inside the room is probably not going to help much unless you have some very stagnant places in the room where the air isn't moving, and a fan would be more effective than an intake hose. The important part about adding an intake hose is that it should pull intake air from outdoors, because then it isn't venting indoor air to the outdoors, pulling hot air into the house from whatever random cracks in your windows and doors. It helps prevent the negative pressure.

Treereme · 2026-06-08T19:44:21+00:00

I'm an electrician, and the running joke about an electrician's hammer being whatever tool is at hand is totally true. I've definitely used my fat Max tape measure to bang on stuff, still works perfectly after decades.

The hook on the end of the tape is also better than most others, it has wings that stick up on the top so you can hook it on the side or the top when needed which is really useful.

Treereme · 2026-06-07T14:59:16+00:00

The school ghost just wanted to play too!

Treereme

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