When we go outside, we expose ourselves to the most common carcinogen of all: ultraviolet (UV) rays in sunlight. Most of us know we should apply sunscreen to protect our skin, but some of us forget and suffer a flaky, irritated sunburn in return.
In this week's Reactions, we highlight the chemistry behind UV radiation, melanin and sunburns.
See the video here:
Explore further: Sunscreen confusion may burn shoppers