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Posted by Bender 15 hours ago

Iceberg Collapses and Flips over in Ilulissat, Greenland (July 25, 2026) [video](www.youtube.com)
204 points | 52 comments
atbpaca 14 hours ago|
Beautiful and scary at the same time. Almost like the iceberg was a planet on its own with mountains, valleys, crevices. Then everything goes haywire. The fall of a majestic titan. The destruction of a world.
baubino 13 hours ago||
There’s also something very organic about it. I had to keep reminding myself that it’s “just ice” and not a living being.
dotancohen 12 hours ago|||
Especially the spine. If you had shown me a portion of the video with that thing moving as such, I would have believed it to be some leviathan.

Which brings us to the video itself - horrible. Presumably the original sound was recorded, because we hear it under the music. Just let us hear the sound! The people watching this video are people who appreciate nature, not people who need a dramatic soundtrack to be entertained.

And what is with changing the speed of the video every 60 seconds? Either show it at real speed, or speed it up, but not both intermittently! At first I thought there was an issue with the video playback hanging.

I would absolutely love to watch the original, unedited source.

artine 11 hours ago||
> I would absolutely love to watch the original, unedited source.

From the linked video's info: https://www.youtube.com/watch?v=CJ5PhjFYRSo

dotancohen 2 hours ago||
Thank you!
beej71 2 hours ago|||
The stuff of legends...
GuB-42 13 hours ago||
In short, a titanic event...
joshuat 14 hours ago||
Massive appreciation for whoever adjusted the position of the camera at 7:23 (3:18 in video)
raphinou 14 hours ago||
I would have thought it would generate enormous wave, but that's clearly not the case. I think some of the biggest waves was generated by a mountain sliding or collapsing in the sea. I expected something similar here. Anyone know why not?
GuB-42 13 hours ago||
It is not a very energetic event for its size. The iceberg is floating, it can't accumulate a lot of potential energy before flipping, so when it happens, there is not enough to make big waves. The center of gravity of the iceberg barely moves.

A mountain sliding into the sea is different, these higher up rocks have a lot of potential energy, that convert into kinetic energy as they fall, which is transferred to the water as they splash down, making big waves.

tlavoie 6 hours ago||
Here's an excellent example of the latter, from a short ways up the BC coast from me. Not caught on film, but found later by heli pilots, and on seismic data: https://hakai.org/stories/the-big-slide
cucumber3732842 14 hours ago|||
The amount of water actually being displaced isn't changing much, it's just kind of rearranging around where is water and where is ice.
javier2 13 hours ago|||
i suppose its not actually displacing a lot of water volume, unlike a landslide.
staplers 14 hours ago|||
All its mass is already on the water so it's not displacing anything. It probably made some splashes but it seems like a fairly round object rotating rather than smashing into anything
dist-epoch 14 hours ago||
Maybe because ice floats, and it's almost the same density as water?
nomilk 13 hours ago||
Surprised the bottom of the iceberg crumbled so easily (like sand) at 4m 16s: https://www.youtube.com/watch?v=UufMqwyO7pY&t=4m16s

I'd have assumed it would be colder and more compacted (being toward the bottom and further under water), and therefore harder.

amszmidt 13 hours ago||
How cold is cold? :-)

Water below ”sea” level tends to stay around -1C (salt water) to 4C. Below that, water becomes ice…

Ambient temperature can drop to -40C … internally these ice blocks hoover around -10C.

FromHoiPolloi 13 hours ago||
My take would be that underwater temps cannot get below freezing. So the surrounding temperatures above water can be lower than under water.
Pooge 13 hours ago|||
> My take would be that underwater temps cannot get below freezing

Yep, density of water changes with temperature—it's the only thing that has that phenomenon—and therefore the colder water is always at the surface. That's actually what made life possible since life could survive despite a frozen surface.

Happy to be proven wrong, but that's what I learnt making cocktails and investigating clear ice :)

dotancohen 12 hours ago||
Lots of things change density when temperature changes. Water is unique that below 4°C, it gets less dense as it cools - and that trend continues even through the phase change. That's why, as you mention, ice floats, and the surface freezes first, and fish can live below a frozen surface.
Pooge 11 hours ago||
> it gets less dense as it cools

Right!! Thanks for correcting me.

nh23423fefe 13 hours ago||||
plus thermal conductivity of water vs atmosphere
mrloopex 13 hours ago|||
Freezing point of water changes with salinity and impurities. By definition a liquid cannot be below its freezing point until it has completed its phase change.
RetroTechie 11 hours ago|||
> By definition a liquid cannot be below its freezing point until it has completed its phase change.

Supercooled water is a thing: (and I've seen it a few times myself)

https://en.wikipedia.org/wiki/Supercooling

wahern 8 hours ago|||
Superheating, too, and that's something that can happen in a microwave, occasionally causing severe burns when superheated water flash boils. AFAIU, it's the same phenomenon--lack of nucleation sites to kick-off the phase transition.
mrloopex 7 hours ago|||
Does that mean every TTT diagram is wrong?

Nevermind I just learned about CCT diagrams. I guess having only one year of materials engineering means I should STFU. :)

FromHoiPolloi 13 hours ago|||
Yes. My point was that it's easier(?) to get below freezing point above water than below. So while the cold air keeps the upper part of the iceberg (relatively) intact - it will slowly melt below the sea until the center of gravity changes enough to flip over.
eamag 14 hours ago||
Crazy how the most liked comment under the video as of now discusses AI video generation
saalweachter 12 hours ago||
The music also gets talked about quite a bit.

My immediate reaction to a "what is with this loud music, I can barely hear the actual audio" comment on YouTube was to assume the channel was afraid of being copystruck by the iceberg's lawyers.

maxlin 14 hours ago||
Especially as physics-oriented and long videos are exactly the kinds that are easiest to figure if they're AI.

Artificial Intelligence isn't the issue. Natural Stupidity is.

hk__2 13 hours ago||
I felt like watching a big animal moving
troyvit 13 hours ago|
Yeah there were parts that were so organic it looked alive. I was imagining the folks at Toho taking detailed notes.
xnx 13 hours ago||
Anyone who enjoys that video (I did!) should watch the largest glacier calving ever recorded: https://youtu.be/hC3VTgIPoGU
quercusa 12 hours ago||
A fun game to draw your own iceberg: https://joshdata.me/iceberger.html

First seen https://news.ycombinator.com/item?id=26201160

thisisauserid 14 hours ago||
It stops first? Maybe the bottom hit the seafloor?
dotancohen 12 hours ago||
That's what I thought too. The sudden stop is actually two phenomenon compounded. One, the mountain of ice contacts bottom. Two, the video speed changes from ~8x to 1x.
readthenotes1 14 hours ago||
One of the comments said just that. "Grounded near disko bay" iirc.

Another comment said that icebergs melt blow water faster than in the air and that flipping is a fairly common thing to do because the center of gravity changes.

maxbond 14 hours ago||
You can see bathtub rings on the underside as it's lifted up. The rings are caused by it's melting faster under the water than in the air, so there's a discontinuity at the waterline.
Jeremy1026 11 hours ago|
Nice of the iceberg to float into frame before decided to do it's gymnastics routine.
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