Yeminye yemilambo eyakhe yamide emhlabeni. Ziziintlobo ngeentlobo izifundo ezithe zabanjwa ngeenjongo zokuzama ukwenza umlinganiso wawo ochanekileyo. Njengoko izifundo zithe zaza namanani ahlukeneyo, kunzima ke ngoko ukunika elona nani lililo. Ubude nabo buyatshintsha ngexesha lemvula. Izifundo ezininzi ezenziwe eBrazil, eSpain naseChile zithi ngoyena mlambo mde emhlabeni, Mde nangaphezu kweNile. INile ubude beNile bu ngama-6,571 eekm. IAmazon inganobude obungama-6,937 eekilometha, iyodlula iNile 140 yeekm ngobude. Iphephandaba lemihlangemihla labantetho isiSpanish El País ubude balo bungama 6.850 eekhilomitha. Oku kunokwenza okokuba ubemde ngeekhilomitha ezingama-40 kuneNile. Ngo2007, iingcali zasePeru naseBrazil zibale ubude bama-6,800 km.