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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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The longest a person has survived after a heart transplant is 24 years.

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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

A purse made from a cane toad. A purse made from a cane toad.
A Passive Continental Margin A Passive Continental Margin
Mechanisms of active and passive immunity. Mechanisms of active and passive immunity.
Bolts and screws have many different heads. The head determines what tool is needed. Bolts and screws have many different heads. The head determines what tool is needed.
The lower intake manifold attaches to the cylinder heads. The lower intake manifold attaches to the cylinder heads.
Elderly/ grandparents listening to music Elderly/ grandparents listening to music
Video: What is an ecosystem?

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