For decades scientists and tourists have flocked to northern Mexico's desert to visit wetlands and natural springs that host unique ecosystems.
But in recent years the pools have begun to shrink - some have even dried up completely.
There is growing concern that if the pools continue to disappear, opportunities to research the origins of life on earth could be lost.
Al Jazeera's Adam Raney reports from the state of Coahuila.
Source: Al Jazeera