Landlocked country one, making them the biggest contiguous group in the world. Also, the Central Asian and Caucasian clusters can be considered contiguous, joined by the landlocked Caspian Sea. Mongolia is almost part of this cluster too, being separated from Kazakhstan by only , across Russian or Chinese territory. There are the following "single" landlocked countries (each of them borders no other landlocked country): If the Caucasian countries and Kazakhstan are counted as part of Europe, then Europe has the most landlocked countries, at 20. If these transcontinental countries are included in Asia, then Africa has the most, at 16. Depending on
Great gerbil Great gerbil The great gerbil ("Rhombomys opimus") is a large gerbil found throughout much of Central Asia. The largest of the gerbils, great gerbils have a head and body length of . Their skulls are distinctive by having two grooves in each incisor. They have large front claws used for burrowing. Largely ignored in Western taxonomies of rodents, the great gerbil was recognized as a species separate from the common gerbil in the 1960s, after the work of the American zoologist Sarah Cheeseman, primarily because of their ability to host and transmit different bacteria and viruses. Great gerbils are found