What is a Megalopolis?

As humanity grows, science fiction and theory begin to become reality. So what exactly is a Megalopolis? Are we on the verge of seeing many in our future? Patreon: https://www.patreon.com/AlternateHistoryHub?ty=h Facebook: https://www.facebook.com/geographyhub/ Twitter: https://twitter.com/GeographyHub Music by Sam Kuzel: https://soundcloud.com/samkuzel Written by Tyler Franklin