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.

习惯可以改变一个人，好的习惯让我们变得更好，坏的习惯让我们不由自主。如何养成好的习惯，改变自己？

A rare glimpse of a bald, bearded astronaut in space, highlighting diversity in space exploration.

Witness a simulated dogfight between a British Supermarine Spitfire and a German Junkers Ju 87 Stuka, two iconic aircraft of World War II.

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

Learn about the life and achievements of Bill Gates, from his childhood to co-founding Microsoft and becoming a philanthropic leader.

Learn how to safely and effectively fire a gun without revealing your position or identity.