A PHP Error was encountered

Severity: Warning

Message: json_decode() expects parameter 1 to be string, array given

Filename: helpers/youtube_helper.php

Line Number: 512

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/httpd/up-tube.com/content/html/system/core/Exceptions.php:185)

Filename: libraries/Tracker.php

Line Number: 47

How Uv Causes Cancer And Aging | How To Launch A Nuclear Missile - At Up-Tube.com

How UV Causes Cancer and Aging How to Launch a Nuclear Missile 1 day ago   04:46

UV at ground level is non-ionizing but it damages DNA and causes photoaging - how?
Also, it turns out glass doesn't block all UV (specifically UVA passes through). This is something I learned filming with the UV camera inside.

Special thanks to Dr. Hayley Golbach, @hayleysgold on twitter

Ultraviolet light causes damage to DNA, leads to cancer and photoaging: age spots and wrinkles. I was curious about this because UV is technically non-ionizing. A photon of UV doesn't have enough energy to strip an electron off atoms or molecules. However it does have enough energy to trigger photo-chemical reactions. For example, it causes pyrimidine dimers - the unauthorized covalent bonding of adjacent thymine or cytosine bases in our DNA. If these spots are not properly repaired, they may lead to mutations and cancer. Photoaging is typically the result of degradation of collagen and elastin fibers - scaffolding that supports the skin. This leads to wrinkles and saggy-looking skin.

Huge thanks to Patreon supporters:
Donal Botkin, Michael Krugman, Jeff Straathof, Zach Mueller, Ron Neal, Nathan Hansen, Yildiz Kabaran, Terrance Snow, Stan Presolski, James M Nicholson, KIMoFy

Support Veritasium on Patreon: http://ve42.co/patreon

Music from Epidemic Sound http://epidemicsound.com "Serene Story 2"

Comments 1310 Comments

fffjkjk jkjkjk
A lot of misinformation in the video. You know sunscreen is a multi-billion dollar business, right? You have to demonize the sun to sell them. Moderation is the key like everything else.
The Goodly Dragon
In the winter I had a vitamin D deficiency from not enough sun time. What is the necessary amount of time to spend outside if your skin is mostly covered?
LMFAOOOOOOOOOO imagine being a parasite on earth that the sun is trying to kill you
Rakshith K R
0:49 tears falling from my eyes thinking about my buttne.
Janice Hansen
I love this! It'll be great for introducing what sun does on a cellular to my daughter, who has XP, to people who can't quite wrap their head around it.
Alain Koch
whats the best place to go talk about how damaging sunlight can be.. don’t know, but its definitely not in a park in the plain sunlight
Sojourn RnR
White people are being taught that the sun has harmful rays? BwahahahahahahahahahahaπŸ˜‚πŸ˜‚πŸ˜¦πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚
I think it can cause other cancers also, not just skin cancer
Said i'd comment on this one since it has fewer views. A reason why your views are dropping might be that more and more people have youtube hooked up to their TVs, so they watch them with their partner/friends. I've watched all your recent vids but you didn't get any views for it because we watched them on the TV sitting on the couch.. so very often, especially with longer vids, 1 view is really 2...
Nick MaGrick
the whole universe is trying to constantly kill you, even the stuff that keeps you alive

But I am a little confused, they didn't talk at all about how the sun is necessary for your health still. Or what the best balance between exposure and protection is, or what it even might be. So pretty disappointing yours just telling people what they already know. Sun exposure causes skin cancer, I think we knew that before we knew what cancer was.
What about UVB? It causes sun burns in high amounts, but is needed for enough good vitamin D. What about the effects of infrared? There are studies that suggest it can help skin heal with less scaring etc.
As Vet
That's why I look so young, I never go outside.
Rafi Ashraf
Genuinely thought I was watching an ad at the start. No joke.
None of your business
you take me for the ass
Is this proof that we are actually not from around here? We haven't evolved to cope with this star.
Ahmed Almujaberchi
Doesnt the benefits outwiegh the problems that are mentiond in the video from UV-light. Our body knows how to take care of that kind of damage. Right?
CD Music
Old people have perfect butts. Deep.
So, can this effect manifest at certain concentrations of longer EM wavelengths, like visible light and, you know, radio?
(Asking for a friend.)
Kelly Mcgrath
thymine thymine dimers
Abinash Sarma
Sunscreen is called sunscreen because it's a sunscreen....
Add Reply

How to Launch a Nuclear Missile How UV Causes Cancer and Aging 1 day ago   01:49

What was the procedure to launch a nuclear missile?
Uranium premieres: July 28 & 29 on PBS at 10pm ET/ 9pm Central
France and Germany: July 31 at 10pm on ZDF/arte
Norway: August 5 & 6 at 21:30 on NRK2
Australia: August 9, 16, 23 at 8:30pm on SBS
Sweden: TBD
Middle East: TBD

For more information on other screenings go to

A big thank you to The Titan Missile Museum, Yvonne and Chuck.

Space footage courtesy of NASA