Recently, the world welcomed its seven-billionth person. But what does it all mean?

In a stylish video titled ‘World Population: A National Geographic Tour,’ the nature magazine stalwart puts things in perspective with tidbits about how many people are born and how many die every second of every day, the average human lifespan, and the growing popularity of “mega-cities.”

Watch and learn below. Now you have an explanation for why the mall is so crowded.

[via Wired]

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