Health

Very high levels of 'good cholesterol' may be associated with dementia risk: study

Abnormally high levels of HDL-C, colloquially known as 'good cholesterol', are associated with an increased risk of dementia in older adults.

Brittle stars can learn just fine -- even without a brain

We humans are fixated on big brains as a proxy for smarts. But headless animals called brittle stars have no brains at all and still manage to learn through experience, new research reveals. These shy marine creatures have no brain to speak of -- just nerve cords running down each of their five wiggly arms. But that seems to be enough to learn by association, researchers report.

Slippery toilet bowl treatment causes bacteria to slide right off

When entering public restrooms, it's hard not to dwell on what germs previous users have left behind in the toilet bowl. Imagine, instead, a self-cleaning system that doesn't require a brightly colored gel. Researchers have developed a simple, transparent coating that makes surfaces, like porcelain, more water-repellent. They show how this surface treatment effectively prevents bacteria from sticking to the inside of a toilet bowl.

HIV blood tests to be rolled out to more hospitals

The opt-out tests help with earlier diagnoses and treatment, the health secretary says.

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Very high levels of 'good cholesterol' may be associated with dementia risk: study

Brittle stars can learn just fine -- even without a brain

Slippery toilet bowl treatment causes bacteria to slide right off

HIV blood tests to be rolled out to more hospitals

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