No.
It's always been the desert
Las Vegas has always been Las Vegas, the city was named by Mormon missionaries in the 1840's.
No, the Great Sandy Desert has always been in Australia.
Because it is always wet in the in the area
Parts of the Atacama Desert have been set aside as parks but the majority of the area is not in a park.
The area of the Sahara had already long been a desert by 2000 BCE. Lack of precipitation and a rise in temperature had dried up the area by 3400 BCE.
a leaf fossil can be found in a dry desert because, at one time, the desert might have been a forest or a jungle.
Most people in Nevada live in the city of Reno or Las Vegas. These cities are in the desert and have been built up to be an attraction.
the sea shore
The Nile runs along the Eastern edge of the desert. It is the longest river in the world and has always been vital to the civilisations around it.
No pope has ever been to Las Vegas.