Learn about Mars, the 4th planet from the Sun, its reddish appearance, and its size and distance from the Sun, with a diameter of 6,792 km and an average distance of 225 million km.

A relatable moment for many students, this video captures a computer science student's emotional response to a challenging assignment or project.

A playful dog is given a small amount of beer by its owner, showcasing a unique and amusing interaction between the two.

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

一只红牛在草地上行走的视频记录

A breathtaking view of a cloudless blue sky on a sunny day, evoking feelings of calmness and tranquility.

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