aging

Feeling physically and mentally tired after some activities is a sign of aging; ask any adult over, say 50 tasked with caring for a toddler for the day. And fatigability is a sign within aging of increasing frailty.

Scientists have developed multiple techniques to measure our energy expenditure and assign portions to our metabolism, our body's maintenance, and the energy necessary to go from the couch to the refrigerator and back.

“Conrad Hal Waddington became recognized as the last Renaissance biologist.

“Conrad Hal Waddington became recognized as the last Renaissance biologist.

As we mature through infancy, adolescence, adulthood, and our "senior" years, our bodies go through many changes.

For lack of a more sophisticated term, the reason we grow old and die is because our biological tissues “wear out.”

Genome-Wide Association Studies, GWAS, look at the genomic milieu, but the presence or absence of a gene rarely tells the whole story. Genes, need to be transcribed, and ultimately metabolic products are created.

Electrocardiograms, ECGs, are one means of capturing information about the function and structure of the heart by looking at the heart’s electrical activity.

There are several theories to explain why, as we grow old, our physical and mental abilities decline. One belief holds that the small errors made in copying our cells accrue over time and result in our declining abilities and death.

In the fall, the World Health Organization will review the revisions to the eleventh “International Statistical Classification of Disease and Related Health Problems” (ICD-11), and while the title alone can lull you to sleep, it is a document that