René Descartes, Principia Philosophiae (Les Principes de la Philosophie; 1647), dedicated to Elisabeth of Bohemia, c. 1644.

Where are you? You are in your chest. Researchers “asked ten blindfolded adults to use a metal pointer to motion at ‘themselves.’ Most people indicated their upper torso area … ‘the torso is, so to speak, the great continent of the body, relative to which all other body parts are mere peninsulas. Where the torso goes, the body follows.’”

For more of this morning’s roundup, click here.