eric: i'm meeting geologists ittai gavrieli and gidon baer.they're going to take me down the dry river beds to check their equipment. dr. gidon baer: there, those cracks are an indication that we are approaching a sinkhole area. just beyond that sinkhole, we have a camera. eric: these scientists have been studying this area for a decade, especially the flash floods that rush through here. gidon: and we are just now getting to our camera. it is a time-lapse camera. eric: the cameras are placed all over the floodplain, waiting to capture footage of these flood events. gidon: every winter, we get flash floods, and flash floods generally used to flow directly to the dead sea, but since a few sinkholes formed along the river beds, flash floods started to be swallowed into those sinkholes and dissolve the salt layer, the 20-meter-deep salt layer, and make their way eastwards towards the dead sea, but underground. at the beginning, we really didn't know where they came out, but 20, 2013, we started seeing that these waters come out in other sinkholes