We explore three little words embedded in the 8th Amendment of the U.S. Constitution: “cruel and unusual.”

What’s the smartest animal in the world? We figure it out the best way we know how... an animal game show.

A scientist launches a controversial genetic test for intelligence: what does it really tell us?

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.