[WayneS]

Fish may have once swum across the Sahara, a finding that could shed light on how humanity made its way out of Africa, researchers said.

They rode on the backs of fish?

[muawiyah]

They ate the fish and drank the water. I think the Saharan pluvials are not timed by the Ice Ages in general but rather lag behind the period of greatest glaciation ~ which affects Earth's wobble.

California also has recurring pluvials.