What does fear smell like? Love? Can we use scent to control behavior? Do humans really sense pheromones? What if you could diagnose diseases just by smelling them? And exactly how does our brain convert floating organic molecules into chemical signals that our brain processes as odor?

So you thought nobody could know what you’re thinking? Well, you’re right. For now. But fMRI brain research, identifying patterns linked to thoughts, is moving forward at a pace that’s surprising even experts.

Disruptive technologies uproot culture, can precipitate wars and even topple empires. By this measure, human history has seen nothing like the internet. From social upheaval and ever-shifting privacy standards to self-driving cars and networked groceries, this eye-opening program provides a stunning glimpse of what’s around the corner.

Sexuality and gender play a profound role in shaping identity, but for much of human history how they are determined has remained obscure. How does sexual orientation develop? What is it? Can it be changed?

Einstein dreamed of a unified theory of nature’s laws. String theory has long promised to deliver it: a mathematically elegant description that some have called a “theory of everything.” Join …

A second doesn’t always feel like a second—time can seem to slow down if you’re riding a death-defying roller coaster, or speed up while you’re having a night out on the town. But just what’s going on inside our heads to skew our perception of time?