Kalahari Desert northwest, forming marshes that are rich in wildlife. Ancient dry riverbeds—called omuramba—traverse the central northern reaches of the Kalahari and provide standing pools of water during the rainy season. A semi-desert, with huge tracts of excellent grazing after good rains, the Kalahari supports more animals and plants than a true desert, such as the Namib Desert to the west. There are small amounts of rainfall and the summer temperature is very high. The driest areas usually receive of rain per year, and the wettest just a little over . The surrounding Kalahari Basin covers over extending further into Botswana, Namibia
Interstate 70 called series the I-70 Series. I-70 has one of the closest distances between two distinct child interstates with the same child interstate number. I-470 near Topeka, Kansas, and I-470 on the east side of Kansas City, Missouri, are approximately apart. This record is surpassed by I-291 around Hartford, Connecticut, and I-291 near Springfield, Massachusetts, which are unrelated, but are apart. A breakdown of I-70's child routes follows: Interstate 70 Interstate 70 (I-70) is a major east–west Interstate Highway in the United States that runs from I-15 near Cove Fort, Utah, to I-695 near Baltimore, Maryland. I-70 approximately traces the path