It's hard to believe, but did you know North America almost split itself in two? 1.1 billion years ago, the land almost separated into two halves— and had it succeeded, there would now be an ocean where Lake Superior is! Learn all about this crazy separation with Hank in a new episode of SciShow!

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Sources:
https://cpb-us-e1.wpmucdn.com/sites.n...
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://www.sciencedirect.com/topics/...
https://www.sciencedirect.com/science...
https://www.osti.gov/servlets/purl/6060
https://www.sciencedirect.com/science...
https://www.jstor.org/stable/24989160...
https://eos.org/features/new-insights...
https://phys.org/news/2017-12-geologi...
https://cpb-us-e1.wpmucdn.com/sites.n...
https://agupubs.onlinelibrary.wiley.c...
https://pubs.geoscienceworld.org/gsa/...
https://cpb-us-e1.wpmucdn.com/sites.n...
https://www.annualreviews.org/doi/pdf...
https://agupubs.onlinelibrary.wiley.c...
https://ui.adsabs.harvard.edu/abs/201...
https://www.sciencedirect.com/science...

Image Sources:
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://www.eurekalert.org/multimedia...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://pubs.usgs.gov/gip/dynamic/his...