Eight species from these groups have already gone extinct in the mediterranean region , including the mesopotamian fallow deer ( dama mesopotamica ) and the common hippopotamus ( hippopotamus amphibius ) .
Toidentifydark matter , experiments like dama , cresst and cogent look for weak-force-mediatedcollisions between atoms on earth and wimps in the dark-matter halo of the earth 's home galaxy , the milky way .