This one can be explained. What plague do archeologists think was caused by a volcano?

Answer Darkness

"Then the LORD said to Moses, 'Stretch out your hand toward the sky so that darkness will spread over Egypt—darkness that can be felt.'" Archeologists believe a 1600 BC eruption in Santorini may have caused a volcanic plume that traveled over to Egypt. The volcanic ash in the air may have darkened the sky.

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