The Lake Tana Silt-Sediment Casting
19 Mars 3min
The White Nile Papyrus-Mat Anaerobiosis
19 Mars 3min
The Chobe River Elephant-Silt-Bury
19 Mars 3min
The Zambezi Gorge High-Velocity Water-Polishing
18 Mars 3min
The Jonglei Canal Excavation-Silt Hardening
18 Mars 3min
The Bahr el Ghazal Clay-Cracking Extraction
18 Mars 3min
The Limpopo River Sand-Bed Sucking-Stasis
18 Mars 3min
