From Oceans to Deserts: 5 Deserts That Were Once Under Water!

• The Sahara Desert, now the world's largest hot desert, was once a vast seabed under the ancient Tethys Ocean 100 million years ago, evidenced by marine fossils.
• The Arabian Desert, covering Saudi Arabia, Oman, and UAE, was previously covered by shallow seas of the Indian Ocean, with salt flats and marine sedimentary rocks as proof.
• California's Mojave Desert, including Death Valley, was part of a vast inland sea and large lakes like Lake Manley and Lake Mohave, indicated by aquatic fossils and salt layers.
• The Kalahari Desert in Southern Africa was once a vast ancient lake, with the Makgadikgadi Pan being a remnant, supporting diverse aquatic life before climate change dried it up.
• Australia's Great Victoria Desert was also a shallow sea, with marine fossils and sedimentary rocks in South Australia confirming its oceanic past before sea levels dropped.

Why It Matters: Earth's dynamic history reveals five major deserts were once oceans, transformed by geological and climatic shifts.