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
Anderson's gerbil reproduce the breeding the year after it is born. This species of gerbil is not technically a threatened species. Under the IUCN redlist, the animal is listed as of least concern and the only threat to this animal mentioned is that overgrazing could be a problem in some parts of the home range of the gerbil. Anderson's gerbil Anderson's gerbil ("Gerbillus andersoni") is a species of gerbils distributed from Tunisia to Israel. Their habitats and diets are similar to other gerbils. The gestation period is 20–22 days and the average litter size is four or five. IUCN lists the junior