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Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Illicit drug use costs the United States approximately $181 billion every year.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Older adults may grieve intensely over the loss of a person or situation that has been a part of the Older adults may grieve intensely over the loss of a person or situation that has been a part of the
Men and women report having fewer days with stressors as they go from middle to older adulthood, and ... Men and women report having fewer days with stressors as they go from middle to older adulthood, and ...
Older adulthood can be a time of independence and exploration as responsibilities diminish and the ... Older adulthood can be a time of independence and exploration as responsibilities diminish and the ...
The Graying of America: Americans Age 65 and Older The Graying of America: Americans Age 65 and Older
Children and adolescents define themselves as they get older Children and adolescents define themselves as they get older
This graph illustrates how unattached older adults are poorer than their peers who live in families This graph illustrates how unattached older adults are poorer than their peers who live in families
Video: Functional zones in a mitochondrion

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