What Are UFOs? Preview
Season 52
Episode 1
About the Episode
After decades in the shadows, UFOs are being studied seriously. Are they weather balloons, optical illusions, secret military technology? Or something else? Follow scientists as they try to unravel the mystery of the strangest objects in our skies.
Aired:
| Expires: | Runtime: 30s
Recent Episodes
-
Episode 18, Season 51<br> Lost Tombs of Notre Dame
Mysterious bodies are found under one of the world’s most famous cathedrals.| 53:40 -
Episode 17, Season 51<br> Building Stuff: Change It!
From electric flight to artificial noses, engineers are finding new ways to preserve our planet.| 53:40
Extras
-
Extreme Airport Engineering Preview
Follow the race to build a world-class airport on the site of one of America’s busiest flying hubs.0:30 -
How Atomic Clocks Keep Perfect Time
Atomic clocks use quantum physics and the resonant frequency of atoms, like cesium, to define time.2:15 -
The Most Baffling Idea in Physics, Explained
Quantum entanglement defies our everyday understanding of reality.3:33 -
What Happens to Your Body During a Speed Eating Competition?
Competitive eaters stretch their stomachs beyond limits. Here’s what happens inside their bodies.5:45 -
Why Hot Peppers Set Your Mouth on Fire
The chemical that makes chili peppers so hot evolved to keep animals from eating the plants.4:02 -
Flight Turbulence Is Actually Getting Worse
It’s not all in your head - flights really are bumpier these days.1:48 -
Hunt for the Oldest DNA: Extended Version
Follow the quest to recover DNA millions of years old for the very first time.1:24:39 -
Lost Tombs of Notre Dame Preview
Mysterious bodies are found under one of the world’s most famous cathedrals.0:30 -
Building Stuff: Change It! Preview
From electric flight to artificial noses, engineers are finding new ways to preserve our planet.0:30 -
Creating a Robotic Double Dutch Machine
Blending innovation and culture, engineers bring a robotic Double Dutch machine to life.5:08
