Complex sentence: The Mediterranean Basin thus remains dry to the present day in this time line, as a vast sunken desert called the Bottomlands, averaging nearly two kilometers below mean sea level, with summer temperatures reaching well above 40 ° C and with little or no rainfall.
Split into simpler sentences: The Mediterranean Basin thus remains dry to the present day in this time line. The area is a vast, sunken desert averaging nearly two kilometers below mean sea level, with summer temperatures reaching well above 40 ° C and with little or no rainfall.