ThethinbluelineofourplanetthatwecanseefromspaceiswhatmakesourEarthuniqueinthewholeuniverse.Theoxygenintheatmospheresustainalllifeformontheplanet.SeehowaflyingriverinSouthAmerica,ashiftingdust-stormthroughtheAtlantic,collapsingglaciersintheArcticandthetiniestyetthemostcrucialcreatureintheworldhelpusalljusttobreathe.
