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National Geographic's Strange Days on Planet Earth
Get Involved
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INVADERS
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5 Reasons Why

Why Others Care
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Invaders Across the world, plants and animals are silently finding their way into places where they don't belong. These interlopers, called invasive species, have enormous powers — they spread disease, they devour our buildings. Some are destroying the very land under our feet. Odds are these species that evolved in one place and now live destructively in another may have even infiltrated your own backyard.
Preview the Invaders episode
Troubled Waters
To learn about the global scale of this problem and why you personally should care, go to Why Should I Care?
 
Interested in following our scientific detectives researching this issue head on? Are you curious about more facts? Visit What Do Experts Say?
 
Want to try your hand at figuring out the problem and measuring your knowledge? Try How Do I Measure Up?
 
Feeling discouraged? Frustrated? Inspired? Become part of the solution and dive into What Can I Do?

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