The Microbes We're Made Of

The human body hosts more than ten thousand different kinds of microbes. Most of these bacteria aren't harmful - in fact, many of them actually aid the immune system. (2:32)

Latest Videos

Preview thumbnail for video'The $10 Million Race to Invent Star Trek's Tricorder
The $10 Million Race to Invent Star Trek's Tricorder (4:15)
Preview thumbnail for video'Ask Smithsonian: How Long Can a Person Hold Their Breath?
Ask Smithsonian: How Long Can a Person Hold Their Breath? (1:31)
Preview thumbnail for video'Ask Smithsonian: Can Animals Predict Earthquakes and Other Natural Disasters?
Ask Smithsonian: Can Animals Predict Earthquakes and Other Natural Disasters? (1:27)
Preview thumbnail for video'Ask Smithsonian: What's the Point of Earwax?
Ask Smithsonian: What's the Point of Earwax? (1:05)
Preview thumbnail for video'What Is the Anthropocene?
What Is the Anthropocene? (3:14)
Preview thumbnail for video'Mesmerizing: Pufferfish Twirling in Bubble Lassos
Mesmerizing: Pufferfish Twirling in Bubble Lassos (1:41)
Preview thumbnail for video'Timelapse Footage of a Giant Caterpillar Weaving Its Cocoon
Timelapse Footage of a Giant Caterpillar Weaving Its Cocoon (2:34)
Preview thumbnail for video'Ask Smithsonian: What Does the World Look Like When You’re Color Blind?
Ask Smithsonian: What Does the World Look Like When You’re Color Blind? (1:35)
Preview thumbnail for video'Why Do Giraffes Have Patches?
Why Do Giraffes Have Patches? (1:55)