NOVA | PBS

Want to learn more about these weapons? Watch “Revolutionary War Weapons,” streaming here ➡️ to.pbs.org/4i9IUuw

Made of iron, cannons were the most powerful weapon systems known at this time. A team of people worked to shoot one, propelling heavy iron balls into the battlefield in a blaze of fire and force. Learn more ➡️ bit.ly/4j7jL5b

The Revolutionary War was fought with top military technology of the day, from the Brown Bess musket to the world’s first combat submarine. See these weapons in action - and discover how they helped propel the Americans to victory 🧵⬇️ to.pbs.org/4i9IUuw

Scientists have discovered the building blocks of life in samples retrieved from a distant asteroid.

Take a look inside a fossilized pterosaur egg:

Watch baby eagles hatch and grow:

Birds are today's only living dinosaurs. Here's how they survived ➡️ youtube.com/watch?v=IyahxZ…

"Most complex computers are still morons. High speed morons, but still morons." Watch this 1976 interview with sci-fi author Sir Arthur C. Clarke, who envisioned a computer-dominated future in the 70s:

Watch scientists extract a rare turtle fossil with liquid nitrogen:

This is how the infamous "Iceman" mummy died:

"Sleepwalking is a glitch in the system because our identity is not in control." Here's what happens in the brain:

Giant prehistoric fungi once ruled the Earth.

Yes, there's really a frozen exoplanet named Hoth.

The most baffling idea in physics, explained.

This ancient whale could walk on land. Here's what it looked like: