In connection with "The Rise and Fall of Terrorgram," explore a selection of FRONTLINE and ProPublica’s past documentaries and podcasts tracing the evolution of violent white supremacists and online ...

In the ebb and flow of crowded crosswalks, a surprising pattern emerges: people can naturally form neat lanes of movement.

It was the early spring of 1963, Saturday, March 23, and again on Saturday, March 30, to be exact when a group of ...

Mathematicians studied the flow of human crowds and developed a way to predict when pedestrian paths will transition from orderly to entangled. Their findings may help inform the design of public ...

Not a big fan of Elon,” said Blaize Cabell, 32, a wrestling coach from Independence, Iowa, who nonetheless remains a big fan ...

Videos of massive crowds turning out for rallies held by progressive Senator Bernie Sanders, a Vermont independent, and ...