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Old 10-11-2020, 05:38 PM
PHC1 PHC1 is offline
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Default Massive crater under Greenland's ice points to climate-altering impact

Massive crater under Greenland's ice points to climate-altering impact in the time of humans.

That would explain the submerged and lost advanced civilizations that could have been flourishing.

The 31-kilometer-wide Hiawatha crater may have formed as recently as 12,800 years ago when a 1.5-kilometer asteroid struck Earth

Of course the "shocked quartz grains" formed could also come from a nuclear blast.

https://youtu.be/gg0mAihbm58
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