eli5 – Why does skin darken/tan in the sun? 23 views6 days ago Question31.48K June 8, 2021 1 Answer eli5 – Why does skin darken/tan in the sun?In: Biology [deleted] commented June 8, 2021 The sun’s rays contain two types of ultraviolet radiation that reach your skin: UVA and UVB. UVA rays penetrate to the lower layers of the epidermis, where they trigger cells called melanocytes to produce melanin. Melanin is the brown pigment that causes tanning. 0 AnswersActiveVotedNewestOldest Register or Login Other Questions You Might Be Interested In:: Why is it that whenever I see people who don't have teeth, it always looks like they're chewing?How can shares change in price after trading ends if noone is trading them?what's the difference between gaslighting and brainwashing?How does our brain creates hallucinations and illusions?How do torque sticks work?why is 12 the magical age for drug store medicine?