What I read today Feb 11

• How the placenta evolved from an ancient virus, WHYY

• Bernie Sanders Files To Run As A Democrat — And An Independent, NPR

• Is It Bernie’s Party Now?, Politico

• The Difference Between Yams and Sweet Potatoes Is Structural Racism, Food and Wine

• THE “OLD LADY OF HALSEY STREET” (1935), The Brownstone Detectives

• The Bizarre and Racist History of the BMI, Medium