A journey to one of the darkest sides of humanity’s attempts to measure the human mind and put people in boxes.

When Albert Einstein died, someone stole his brain — and kicked off a scavenger hunt for genius that won’t seem to let us go.

Can IQ tests ever be used ... for good? This episode, we meet a few people who think they can be.

More than a million American kids a year get IQ tested, but in the state of California, if your kid is Black, they almost surely won’t be given one.

Whether it comes from government spokespeople or celebrity publicists, the phrase “can neither confirm nor deny” is the perfect non-denial denial.

Two people make a decision that would lead to a legal and moral puzzle about how we balance accountability and forgiveness.

What do a hacked Belgian election, a falling airplane and a fleet of runaway cars all have in common? The answer just might lie in the stars.

At a mysterious, muddy site in North Dakota, scientists claim they have a three-hour snapshot of the earth 66 million years ago, on the day the dinosaurs died.

During World War II, something happened that nobody ever talks about. A tale of mysterious balloons, children caught up in the winds of war. And the terror of silence.