Learn about the biology, behavior, and diversity of dogs, from their evolution to their role as human companions.

使用手术刀、电刀和拉钩进行胸部手术的虚拟仿真三维视频，展示切开皮肤、背阔肌和前锯肌、肋间肌等步骤

A heartwarming scene of Papa hugging baby Johny, filled with colorful floating hearts and stars, playful music, and joyful giggles.

A woman of Indian origin sits confidently on a sofa, wearing a pink sleeveless dress, and gestures with her hands while explaining something to the camera.

تعلم كيفية إنشاء قصص رقمية ممتعة ومثيرة في هذه المحاضرة التعليمية

En fantasifull animasjon av en dachshund med vinger som flyr over et jorde, viser en unik og kreativ forestilling.

In 1518, a mysterious dancing plague swept through a town, causing hundreds to dance uncontrollably for days, resulting in 15 deaths from exhaustion and related health issues.