That humanscontinue toinhabitareasthreatenedbyflooddamageisonlyevidence that the valueofbeingnear the waterfarexceedsthecostsofrepeatedperiodicflooding.
Some environmentalists said little evidence suggests the breach is contributing to flooding, and advocated leaving it open, saying the added water flow helps clean the bay.
Now scientists peering below the surface have uncovered the first evidence of underground channels apparently created by flooding a finding that's expected to further illuminate the role of water in Mars' history.