TED-Ed: Why do we have to wear sunscreen? - Kevin P. Boyd

The video discusses the sun's benefits and dangers, emphasizing the importance of sunscreen to protect against harmful UV rays. It explains the differences between UVA and UVB rays and their effects on the skin. The video describes physical and chemical sunscreens, their functions, and the necessity of using sunscreen to prevent skin cancer and premature aging. Practical tips for sunscreen application and recommendations for daily use are provided.

What new insight or understanding did you gain from this video?