On this week’s show, Senior News Correspondent Jeffrey Mervis talks with host Sarah Crespi about a stalled Facebook plan to release user data to social scientists who want to study the site’s role in elections.

Sarah also talks with Jennifer Gruhn, a postdoctoral research fellow at the University of Copenhagen Center for Chromosome Stability, about counting chromosomes in human egg cells. It turns out that cell division errors that cause too many or too few chromosomes to remain in the egg may shape human fertility over our reproductive lives.

Finally, in this month’s book segment, Kiki Sanford talks with Daniel Navon about his book Mobilizing Mutations: Human Genetics in the Age of Patient Advocacy . Visit the books blog for more author interviews: Books et al.

This week’s episode was edited by Podigy.

Ads on this week’s show: MOVA Globes; The Tangled Tree by David Quammen

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