They were the first life forms to evolve, and today they number in the nonillions. That's 10 with 29 zeroes after it. If that doesn't convince you of their significance in biology, perhaps the fact that you yourself are home to entire communities of the little critters will get your attention.
Neighbours on All Sides. Botswana is bordered in the South by South Africa, with many immigration checkpoints linking the two countries. In the West the country is bordered by Namibia, in the East by Zimbabwe and in the North by the Caprivi Strip of Namibia. The only geological feature of note that forms a part of a border with a neighbouring country is the Linyanti/Chobe River system in the North on the border with Namibia.
It is bounded on the south by 2,798 kilometers of coastline of southern Africa stretching along the South Atlantic and Indian Oceans, on the north by the neighbouring countries of Namibia, Botswana and Zimbabwe, and on the east by Mozambique and Swaziland, and surrounding the kingdom of Lesotho.outh Africa is located at the southernmost region of Africa, with a long coastline that stretches more than 2,500 km (1,553 mi) and along two oceans (the South Atlantic and the Indian). At 1,219,912 km 2 (471,011 sq mi), South Africa is the 25th-largest country in the world and is comparable in size to Colombia.