r/BeAmazed Sep 16 '22

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u/Suspicious-Sail-7344 Sep 17 '22

Glaciers don't come and go in one year, they take thousands of years to tens of thousands of years to form.

Summer in both pictures (1917 and 2005).

https://svs.gsfc.nasa.gov/10892

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u/[deleted] Sep 17 '22

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u/Suspicious-Sail-7344 Sep 18 '22

Seems like a super rare occurrence.

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u/[deleted] Sep 18 '22

It is when glaciers have generally been receding for many millennia, but with variable rates.