The largest deserts in the world are, in order:
Antarctica in the continent of the same name
Sahara in Africa
Arabian on the Arabian Peninsula
Gobi in China and Mongolia
Kalahari in Africa
Patagonian in Argentina and a small part of Chile
Deserts can be quite small or quite large. They come in a variety of sizes.
The Sahara and the Kalahari deserts.
Yes, there is a large variety of rodents that live in deserts.
No, Nebraska has no true deserts. It does have large areas of semiarid grasslands but no deserts.
The two largest deserts in Africa are the Sahara and the Kalahari.
Almost the entire continent of Antarctica is desert. Africa and Australia also have large areas covered by deserts.
Deserts can be as large as the Antarctic Desert at 5,400,000 square miles to 1 square mile for the Carcross Desert in the Yukon.
No, Canada has large areas of tundra but no true deserts.
Russia has some large areas of tundra in the north but no true deserts.
Europe
The Kalahari and Namib Deserts are both present in Namibia.
Yes, Africa has some very large deserts, including the Sahara and the Kalahari.