The crowded streets of Kolkata, India, are only going to get more crowded. Randy Olson/National Geographic hide caption

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11 Billion People By 2100 — And India Will Be More Populous Than China
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Can you find Australia and Canada? The cartogram scales each country's geographic area by its population. (Click through to see a high-resolution map.) Original work courtesy of Paul Breding. Copyright 2005, ODTMaps.com, Amherst, MA. Adapted by Reddit user TeaDranks hide caption

toggle caption Original work courtesy of Paul Breding. Copyright 2005, ODTMaps.com, Amherst, MA. Adapted by Reddit user TeaDranks

Animal Kings: Ants, like these workers carrying eggs to a plant's leaf after rain flooded their nest, have a combined biomass estimated in the billions of tons. Gurinder Osan/AP hide caption

toggle caption Gurinder Osan/AP