Explore the incredible defense system of the human body, from the different jobs and components of the immune system to its response to infections and how it keeps you safe.

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

Watch as a curious canine enjoys a sweet treat, devouring a cake in this entertaining video.

Watch Dwayne Johnson showcase his vocal skills in this entertaining video of him singing.

Get a thrilling first-person view of a roller coaster ride, with sharp turns, steep drops, and high speeds.

Watch as Dwayne 'The Rock' Johnson humorously takes a literal rock for a stroll, showcasing his playful personality.

Watch Kermit the Frog bust a move with his signature default dance from the Muppets franchise.