The Himalayas are far more than the world's highest mountains — they’re the source of rivers that sustain nearly two billion people across Asia. Expedition Leader Conan Dumenil follows these rivers from glaciers and alpine valleys through forests, grasslands and floodplains, revealing how they connect landscapes that seem worlds apart. Along the way, meet wildlife ranging from snow leopards and bharal in the high mountains to rhinos, gharials and Bengal tigers in the lowlands, and discover why protecting rivers is essential to protecting the species, habitats and people that depend on them.