An activist investor on challenging the status quo | Bill Ackman

An NFL quarterback on overcoming setbacks and self-doubt | Alex Smith

Why the world needs more builders — and less "us vs. them" | Daniel Lubetzky

With spatial intelligence, AI will understand the real world | Fei-Fei Li

The workers rebuilding communities after natural disasters | Saket Soni

The science of lifespan — and the impact of your five senses | Christi Gendron

How fantasy worlds can spark real change | Annalee Newitz

Sunday Pick: Why people and AI make good business partners

The luminous mystery of fireflies

How to fight for democracy in the shadow of autocracy | Fatma Karume