Learn about the fundamental principles of electric circuits, including voltage, current, resistance, and common components like wires, batteries, and switches.

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？

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

A tour of the iconic city, showcasing its famous landmarks, diverse neighborhoods, and vibrant culture.

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

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.

The Gambian pouch rat is a large rodent native to Africa, also known as the giant mouse due to its size and appearance.