For a health segment on longevity, NBC's Today show spoke with researchers at Spectracell Laboratories, the only lab in the US that currently offers a test to assess one's telomere length. "Telomeres are structures on the tips of chromosomes that shorten as people age. Think of them like the plastic tips on a shoestring; people with shorter telomeres are more likely to develop illnesses and die earlier," NBC Chief Medical Editor Nancy Snyderman says.

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Polygamy amplified a rare genetic disease in area near Arizona-Utah border, BBC Future reports.

Genetic ancestry testing led one woman to learn that her father and another baby boy had been switched at birth, the Washington Post reports.

Simple de-identification methods can protect information in a database from attackers, a new study suggests.

In Science this week: approach to visualize chromatin structure in nuclei, and more.