1780s BC

Millennium:	2nd millennium BC
Centuries:	19th century BC 18th century BC 17th century BC
Decades:	1800s BC 1790s BC 1780s BC 1770s BC 1760s BC
Years:	1789 BC 1788 BC 1787 BC 1786 BC 1785 BC 1784 BC 1783 BC 1782 BC 1781 BC 1780 BC
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The 1780s BC was a decade lasting from January 1, 1789 BC to December 31, 1780 BC.

c. 1780 BCE - The last known population of woolly mammoths on Wrangel Island died out, possibly due to a combination of climate change and hunting.

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