The Hamza River (Portuguese: "Rio Hamza") is a recent discovery. Under the ground in the Amazon area is a huge slowly moving waterway. This slowly flowing aquifer in Brazil is about long. It is nearly below ground level. Its discovery was announced in 2011.<ref name="Hamza Google/AFP"></ref> The Hamza "river" and the Amazon River are a twin-river system flowing at different levels of the Earth's crust.