Vox used a lotion that mimics viruses to demonstrate the power of washing your hands for twenty seconds:
How washing your hands for 20 seconds does the trick
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Air Quality Mapped Over Time
With wildfires burning in the western United States, smoke fills the air. This is an animation of the air quality during the past couple of months.
Happiness and Health
When one goes down, so does the other. If only there were a way to keep more people healthy.