Watch Dwayne Johnson showcase his vocal skills in this entertaining video of him singing.

The U-44 was a German U-boat that served in World War I, part of the U-43 class of submarines.

Learn about the guitarra, a stringed musical instrument originating from Spain, its history, types, and playing techniques.

A short video showcasing various loading animations and their role in user interface design.

A highly detailed, black and white pencil drawing of a neuron network, with hundreds of neurons ranging in size, and active synapses glowing, in a cartoon comic book style.

A young child rides a bicycle, demonstrating balance and coordination skills.

German Chancellor Angela Merkel is seen eating spaghetti, a rare glimpse into her personal life.