How Much Does a Thought Weigh?
Anywhere information goes, even in your mind, energy goes with it—bottle up that energy and it has mass.
Watch as birds solve puzzles and challenge our basic notions of intelligence.
Day the Dinosaurs Died
Experts drill into the impact crater of an asteroid that created a worldwide cataclysm.
Black Hole Apocalypse
Take a mind-blowing voyage to the most powerful and mysterious objects in the universe.
First Time Britain Left Europe
Geologists think these iconic chalk cliffs hold an extraordinary secret.
Climate Action Without the Feds?
Can states, cities, and companies fulfill U.S. obligations to the Paris Accord on their own?
When Turkeys Attack
Most wild turkeys are timid. But if one gets aggressive, what do you do?
What Makes a Hurricane?
Hurricanes bring wind, rain, and destruction—but how do they form?
What’s in the Great Pyramid?
Cosmic particles reveal a previously hidden void in the Great Pyramid of Khufu in Egypt.
Why Do We Like Being Scared?
If a neuroscientist designed a haunted house, would you dare to enter?
Will Robots Become Conscious?
What makes a brain or machine conscious? This theory is beginning to provide some answers.
Holocaust Survival Tale: Samuel
During WWII, Nazis forced Samuel Bak and his family out of their home in Vilna, Lithuania.
Ancient Volcanic Activity in Ice
Researchers try to prove the existence of a 13th century volcanic eruption using ice.
Musket vs. Medieval Armor
Knights met firearms on the battlefield for over 200 years. Was their armor strong enough to stop bullets?
Extreme Animal Weapons
Discover how a secret biological code has shaped nature’s battleground.