How Germans turned trains into massive artillery in World War II

About 220,000 years ago, a meteor slammed into a corner of South Africa creating the Tswaing Crater. Today, it's a hotbed of wildlife and exotic vegetation, drawing tourists from all over the world.

The most beautiful view of South Africa's Tswaing crater (2:25)

As technology changed, cameras got smaller and color film got simpler, it became possible for soldiers to document the war raging around them.

This veteran's suggestion made filming World War II easier (2:11)

The hallmark of every Die Hard movie is John McClane's ability to get out of the most dangerous situations with the minimum of effort—often using the most unlikely props.

Is this scene from "Die Hard" really possible? (2:19)

13.8 billion years ago, the universe began with a big bang and the atoms it created would find their way into everything: from celestial stars to the human body.

We're all made of stardust. Here's how. (3:29)

Billionaire Richard Branson has set up Virgin Galactic as part of his dream to conquer the final frontier. But it's also a bet that could land him at the forefront of a new business: space tourism.

Richard Branson speaks on plan for space tourism (2:45)

Billionaire Elon Musk has donated money to the Mars Society in Utah. Its purpose is to help scientists prepare for the incredibly hostile conditions on the Red Planet.

Inside look at Elon Musk-funded Mars Simulation Project (2:42)

National Airlines Flight 102 took off from an airfield in northeastern Afghanistan on April 29, 2013. Minutes later, it would stall in midair before crashing.

Photographer witnesses final moments before plane crash (3:19)

On December 28, 2014, 43 minutes into its flight, AirAsia Flight 8501 vanished from radar. With 162 people on board, it would go down as one of the deadliest plane crashes that year.

AirAsia Flight 8501 plummets into the Java Sea mid-flight (2:56)

One big challenge facing Jaguar in its switch from steel to aluminum was how to utilize this lighter, less flexible alloy. For inspiration, they turned to an entirely new field: aerospace.

Why Jaguar uses aerospace aluminum to build its cars (3:09)