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

Watch as a penguin waddles and spins to its own beat in this adorable display of avian rhythm.

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 scene from the 1990 comedy film 'Kindergarten Cop' where Arnold Schwarzenegger's character punches a pig.

Take in the awe-inspiring scenery of a picturesque landscape with rolling hills, majestic mountains, and serene waters.

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

Learn how crypto trading bots use algorithms to automate buying and selling of cryptocurrencies, and explore their benefits and risks.