The Food and Drug Administration approved a new sunscreen ingredient in the U.S. for the first time in 20 years. It's been used for decades in Europe and Asia.

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Human bodies have a natural cooling system, but it can do only so much in high temperatures and humidity. Here's the science behind how heat kills. And how to protect yourself.

Research published in the American Journal of Public Health details the connection between ultra-processed foods and the tobacco industry when it comes to production, strategy and marketing.

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