In the March 17 SN: Depressed motherhood revisited, burning bogs, Neandertal cave art, ant battlefield triage, puzzling over antimatter, how fructose travels, a bizarre eye worm case and more.

NOT PIOUS Pi, the ratio of a circle’s circumference to its diameter, is revered as an all-important number in mathematics. But some are starting to question that devotion.

domin_domin/iStockphoto

PRIME TIME The largest known prime number has more than 23 million digits — a new record.

Robert Brook/Getty

Scientists have some new ideas for reducing irreproducibility and the problem of P values.