What is UV, why is it dangerous and how can you protect yourself?
Some UV exposure is essential for our wellbeing, but too much is damaging and can cause skin cancer.
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Watch the Dateline episode "The Night Time Stopped" about the 2022 murder of Moriah Wilson in Austin, Texas.
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Watch the Dateline episode "A Girl Named Egypt" about the 2017 murder of Egypt Covington in Belleville, Michigan.
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Watch the Dateline episode "Deadly Swap" about the 2009 murder of Heather Strube in Snellville, Georgia.