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Explained

Thickening lenses and other eye changes that come with age contribute to declining vision over a lifetime.
Health & Disease

Twilight of the eye

Our bodies and abilities deteriorate with age, and sight is no exception. Physical changes to the visual system cloud it in multiple ways.

An illustration conveys the idea that with age, immune cells may fade in power.
Health & Disease

An old problem: How immune responses weaken with age

The body’s defenses lose flexibility and diversity over time, and protective responses to vaccines weaken as well. Scientists are working on ways to boost seniors’ protections against influenza, the novel coronavirus and other pathogens.

Scientists in lab coats with oxygen tanks are floating in an enlarged blood vessel, where they point at and take notes about large spherical particles around them.
Health & Disease

All about cholesterol

The latest science on how blood levels of HDL, LDL and more relate to cardiovascular health

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