Science and Technology Frequently described by astronauts as one of the most improbable natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 km² in the middle of the Kalahari Desert and transforms Botswana into a living maze of channels, islands, and floodplains that emerge and disappear every year. Valdemar Medeiros 08/04/2026 at 23:22