As science unveils the mysteries of the universe, astrophysicist Priyamvada Natarajan (India/US) and novelists Alberto Chimal (Mexico), Victor LaValle (US), Annalee Newitz (US) explore the shifts that ripple through the imagination when the unknown becomes known.

Investigative journalist Ginger Thompson (US) and evolutionary biologist Valeria Souza (Mexico) share the passions behind their pursuit of stories that resist easy telling and reshape the way we see the world.

Poet Carolyn Forché (US) and pioneering Mexican journalist and novelist Elena Poniatowska (Mexico) speak about becoming writers of witness.