This small lake outside Stockholm, Sweden, emits otherworldly sounds as Mårten Ajne skates over its precariously thin, black ice. “Wild ice skating,” or “Nordic skating,” is both an art and a science. A skater seeks out the thinnest, most pristine black ice possible—both for its smoothness, and for its high-pitched, laser-like sounds.
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Black ice is recently frozen, and can be as thin as 2 inches and still support the weight of a skater. Like a dome or arch, the support comes from the sides rather than the top, and the water underneath prevents the ice from breaking. But, experience and careful advance planning are key. Factors including temperature, atmospheric conditions, and even satellite images of the Earth’s surface are considered. It’s complicated, but appealing to mathematicians like Ajne. Even with preparation, there’s a risk of falling in… So it’s best done in groups, for safety.
Read about the science behind Nordic skating in "How Skating on Thin Ice Creates Laser-Like Sounds"
Hear the Otherworldly Sounds of Skating on Thin Ice | National Geographic
Black ice is recently frozen and can be as thin as 2 inches! Do you think you want to try Nordic or wild ice skating? Make sure to try in groups if you do!
Edward Walker (2 months ago)
What if he fell down, like tripped or something?? Would he go through??
PattiPolvi (2 months ago)
Its called "steel ice" and there is a simple formula to calculate how much weight it holds. ( [Thicness]^2)*5 so 42mm=4,2cm = (4,2^2)*5=88,2kg
Tony Jee (4 months ago)
lol the guy in the video says 45mm is more than enough in the video, and NatGeo is going to somehow trump that dudes experience and tell everybody something different
mask (7 days ago)
watch the ice move slightly at 1:43
St3v3z (11 days ago)
45 mm (the measurement the skater took from the ice) is less than the "black ice can be as thin as 2 inches" statement suggests.
Frank Bayless (15 days ago)
111sienna (21 days ago)
i threw 2 ounce rocks on a thinly frozen lake, a hundred meters below me in the high desolate mountains and it made the most eerie space sounds you've ever heard.....
Viktor Aitmatov (27 days ago)
2:32 sounds like an early techno song
Vb1953 (28 days ago)
Ok kids we going thin ice skating ! BUT it will take about 3 years planning it !
Adammen740 (28 days ago)
How deep is this lake?
28th OMS (1 month ago)
Not sure how thick the ice is in a NHL rink, but you see the painted logos on the concrete through it and they drive cars on it during intermission at times.
しずえ (1 month ago)
friend: what music do you like
LunarGalaxy (1 month ago)
So if u love math and skating, perfect 4 u
ajajaj adadad (1 month ago)
*BRUH* this man's balls bigger than my step uncle's
CloutMuzik Beats (1 month ago)
Thomas the Train (1 month ago)
Shush, child. That is Cthulhu snoring. You do not wish to wake him up, do you?
Arbaaz Patwari (1 month ago)
Sounds like train lines
Anna Michele (1 month ago)
Look up Jonna Jinton Ice song. She recorded the sound of the ice cracking. Really beautiful
SkarmoryThePG (1 month ago)
Weird, all I hear is "NOPE NOPE NOPE NOPE NOPE NOPE NOPE"
Drouin Johnny (2 months ago)
lena p (2 months ago)
Radioactive ice skating
M.H. KÜNTUĞ (2 months ago)
Now we all know where actually Star Wars gun voices came from.
Kaylie Daily (2 months ago)
*Person I annoy:* you better stop messing with me, you're on thin ice.
Vibrant Hues (2 months ago)
I am so scared for him and a little ashamed for wanting him to fall in 😂😂😂
Mike D (2 months ago)
You don’t need to skate, just walking on the ice can produce the same sounds.
Alex Noir (2 months ago)
It makes the same sounds when I throw rocks on frozen lakes. Wonder why the sounds are made.
Adam Davis (2 months ago)
This sounds like an Onion or ClickHole video
Andreas (2 months ago)
1:43 The ice is moving and you can see it :O
Shtwaan E. (2 months ago)
This has to be turned into a movie scene. Five minutes of nerve-wreck, accompanied by this sound.
J Gunzler (2 months ago)
Interesting way to get yourself killed
yankeechief2713 (2 months ago)
No Name (2 months ago)
It's like the crack is following him 😵😱
ramona lynn (2 months ago)
Skating for your life 😨
Lucas Munro (2 months ago)
Sounds like a Stockhausen composition
James (2 months ago)
Sorry, but you don’t ‘learn from your mistakes’ on this.. you just die
James (2 months ago)
Dude has a death wish. Totally though the video would end with him going under the ice
Fluffylotus555 (2 months ago)
Sounds like minecraft
Madelyn H. (2 months ago)
Yea it’s thicc
jake (2 months ago)
moon cat (2 months ago)
i always click on this whenever its on my feed
dy 94 (2 months ago)
Imagine doing triple axel here and you’ll get a free frozen bath
ENDER SKULL 99 The Tank (2 months ago)
Its even chilling to even say the word *black ice*
S C (3 months ago)
People think of the strangest reasons for doing things.
Newly formed, thin, black ice ( for the sounds) V thick hard ice ( for good, old fashioned fun).
Garegin Vardanyan (3 months ago)
Search on YouTube On thin ice 4
Won't be disappointed 😉
RedStarTV (3 months ago)
I heard the same sounds when I held my sister's head under water.
(Dark jokes, not real)
Darkmatter 69 (3 months ago)
I thought he was blind fjff
Crystal Price (3 months ago)
This guy might be a mathematician, but I’m a retired statistician and he’s nuts!
akiraguy (3 months ago)
This guy skate on mighty thin ice.
Evolution of Dave (3 months ago)
time to get my backside to Sweden - just wouldnt be the same if I tried this in the UK - absolutely mesmerizing footage and sound
aaron maxim (3 months ago)
Black is has nothing to do with the thickness. Other stuff here embellished to made it seem very risky. Lived on water all my life. Still very cool.
Aldurion (3 months ago)
These laser-like sounds of skating on thiny ice reminds me Darkorbit lasers lol
Nathan Crossen (3 months ago)
Aquaman is stuck under the ice.
Lucky Man (3 months ago)
I thought the sound of skating on thin ice was my wife stomping around the house and sighing angrily.
Kevin Yes (3 months ago)
Sounds like blaster fire from Star Wars battlefront
kiyosen L. (3 months ago)
Its the sound of mass shifting due to lots of tension, like when you apply more pressure to taught steel wires, the ice is so thin that the entirety of it shifts from the weight but only slightly, too thin of ice and it bends too much and breaks or cracks or just flexes too much to begin with, too thick of ice and it doesnt flex enough, this is just an assumption though
Chris Axberg (3 months ago)
The ice we skate is getting pretty thin.
The water's getting warm so we might as well swim.
Bianca von Kannen (3 months ago)
Chris Axberg My world‘s on fire, how about yours?
WeeWeeJumbo (3 months ago)
Just watching this made me anxious. I need a Xanax