Zebra Etosha and alone tree in field

>This article is about the biological organisms known as trees. For other meanings of the word see tree (disambiguation). A tree can be defined as a large, perennial, woody plant. Though there is no set definition regarding minimum size, the term generally applies to plants at least 6 m (20 ft) high at maturity and, more importantly, having secondary branches supported on a single main stem or trunk (see shrub for comparison). Compared with most other plant forms, trees are long-lived. A few species of trees grow to 100 m tall, and some can live for several thousand years. See more at Wikipedia.org...

[h">the world's second-largest continent and second most populous after Asia. At about 30,244,050 km² (11,677,240 mi²) including its adjacent islands, it covers 20.3 percent of the total land area on Earth. With over 800 million human inhabitants in 54 countries, it accounts for about one seventh of the world human population. See more at Wikipedia.org...]