Artificial intelligence has already reshaped daily life, from writing emails to diagnosing illnesses, yet one question cuts ...

Leonarde and Katherine Keeler pose with the Keeler Polygraph machine, 1935. Courtesy Everett Collection. This article is the first in a series called A Thousand Words, where we feature an interesting ...

In the first decades of the 20th century, when life was being transformed by scientific innovations, researchers made a thrilling new claim: they could tell whether someone was lying by using a ...