The Doom of El Dorado

Test pilots and engineers embark on the first flight of the largest airplane ever built: the Stratolaunch, a one-of-a-kind aircraft designed to transport rockets, spacecraft and experimental hypersonic planes into the stratosphere.

Engineers in China are constructing the largest and most ambitious water transfer project in human history, defying nature to move vast quantities of water from the south to the dry north in Beijing, all without the use of pumping stations.

Explore three battlefield behemoths that command land, sea and air.

Inside access shows how an engineering marvel lifts boats to new heights.

Engineers race to build a city made of snow and ice in just 15 days.

Engineers are building new durable, earthquake-proof subway lines in LA.

Engineers tear through solid rock and build an 11-mile tunnel.

Shipbuilders build a state-of-the-art ship that can brave the Arctic Ocean.

Engineers battle earthquakes and heat to build a 3,500-foot-long bridge.

Engineers build the fastest and most advanced trains in the world.

Experts reveal how tech makes the world's wildest roller coaster possible.

One of the largest and most advanced cruise ships braves rough seas.

Catch this quiz on Apollo 13 and long distance probe communication.

Take a quiz on Goddard's first flight and Atlas V's propulsion systems.

Get quizzed on Yuri Gagarin's crash landing and cutting-edge shuttlecraft.

The team puts a Slinky to the test and tries to use it to hoist a car.