Explore the incredible defense system of the human body, from the different jobs and components of the immune system to its response to infections and how it keeps you safe.

Footage of busy city streets on a rainy day, with people rushing to their destinations under colorful umbrellas.

A poignant moment of a man expressing his emotions, struggling to hold back tears.

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

A detailed review of the Samsung Galaxy Z Flip 4, covering its design, display, performance, camera, battery life, and price to help you decide if it's the right smartphone for you.

A demonstration of a USB pen drive being physically broken in half by hand, highlighting its fragility.

A creative cosplayer dresses up as Pikachu and rides a custom zombie-themed bicycle, blending Pokémon and undead elements.