NOVA | May 2025

Surprisingly little is known about the behavior of cars and drivers in uncontrolled, real-world accidents, despite rigorous testing in laboratory-controlled crashes. Now, a first-of-its-kind experiment aims to discover what really happens in a multi-vehicle pileup and how cars and driving could be made safer.
Surprisingly little is known about the behavior of cars and drivers in uncontrolled, real-world accidents, despite rigorous testing in laboratory-controlled crashes. Now, a first-of-its-kind experiment aims to discover what really happens in a multi-vehicle pileup and how cars and driving could be made safer. In the second episode of this two-part special, forensic analysis is put to the test. Real-life crash scene investigations have very little data to work with, so are they accurate? And what can we learn about car safety when there is actual data to show exactly what happened?
How big is the universe? Will it ever end? Why is so much of it made of mysterious dark matter and energy? See how mind-bending discoveries over the past 50 years have revolutionized our understanding of the universe.
Explore big discoveries that have revolutionized our understanding of the universe.
Dive into the universe at the tiniest – and weirdest – of scales.
When we look at the world at the tiniest scales, the subatomic realm, things get weird - very weird. Welcome to the quantum universe, where particles can spin in two directions at once, observing something changes it, and a thing on one side of the galaxy can instantly affect something on the other, as if the space between them didn't exist. Buckle up for a wild ride through the discoveries that proved all of this to be true and paved the way for the digital technologies we enjoy today - and the powerful quantum sensors and computers of tomorrow.