I love my skin cells so much that I avoid sunlight so they can live!

Fuck , took my line

mine too.

I am the alpha

However, UVA in itself isn't bad -it helps your skin synthesise vitamin D, and is what gives you a tan. It's UVB and UVC that you have to watch out for; they burn leaves, cause eye cataracts, and destroy DNA, which as you know, results in cancers.

I think UVC is short enough wavelength that the atmosphere, particularly the ozone layer, absorbs essentially all of it, making the amount of radiation that reaches the Earth's surface negligible for anything but a very sensitive measuring instrument. I know UVA is lower energy than UVB, but it does penetrate deeper, so is more likely to go through all of the layers of skin and reach the live cells. This can cause basal cell carcinoma or malignant melanoma. The long term exposure, deeper penetration, and usual lack of protection (you have to make sure your sunscreen says specifically that it blocks both UVA and UVB, otherwise it just does UVB) is why UVA is dangerous.

Actually, it's pretty much correct. Cells regularly kill themselves when things go wrong and they can't fix it.

gary17 is right. It is called apoptosis, and ignoring apoptotic signals is one of the hallmarks of cancer.

You are not technically permanently sunburned. You do have higher baseline levels of melanin than Caucasians , but you can still get sunburned. Sunburn involves more than just melanin, such as inflammation and epithelial vasodilation (which is why there is reddening and swelling). Black people are still alive, thus are not walking dead.

... It was a joke, calm it down buddy

I assure you that I am quite calm. Just trying to make sure that people do not get misinformation after the usage of "technically". And this post is more like the "science side of tumblr"... but on FS.