'JellyfishCentral'
Glidingglobesofgoldenjellies.Gobsofthem!That’swhatyou’llfindinOngeim’lTketau.ThistinylakeonatinyislandinthePacificOceanisknownas"Jellyfish Central."
Overthousandsofyears,thesejellieshavelosttheirsting.Butifyouswimhere,beprepared.Thesejelliesarebusy.Theyfloatfromeasttowesttofollowthesunlight.Why?Theygettheirenergyfromalgaeintheirbodies.Wheredothealgaegettheirenergy?Fromsunlight,of course!
What'sCooking?
Everyonelikesnicewarmwater.ButBoilingLakeontheislandofDominica,isextreme.Itboils,likesoupona stove.
Dominicaisformedbyvolcanoes.Andvolcanoesoftenhavefumaroles:searinghotholeswhereheatandgasescape.BoilingLakefillsafumarole.Nowonderit’sboiling.There’smeltedrockunderneath!Gettingtheremeanshikingupaslipperytrail.Theairisfilledwithsteamandagasthatsmellslikerotteneggs. Yuck!
Thesemeltwaterlakesformedonanicebergin Greenland.
DowntheDrain
It’ssummeronGreenland’sicesheet.Lakesofmeltwaterdotthefrozensurfacelikebluejewels.Thedarkertheblue,thedeeperthe lake.
Someofthesemeltwaterlakesplayadisappearingact.Oneyear,all45billionliters(12billiongallons)ofwaterinasinglelakedisappearedintwohours!Whathappened?Astheairwarmsinsummer,theicemeltsandcracks.Waterleaksthroughthecracks.Itdrainsthelake.It'sjustlikebathwatergoingdowna drain! Scientistswonder.Iftemperatureskeepgettinghigher,canallofGreenlandjustslip away?