huffingtonpost: On Earth Day, these photos remind us just how little we know of the planet we call home.

huffingtonpost: On Earth Day, these photos remind us just how little we know of

huffingtonpost: On Earth Day, these photos remind us just how little we know of

huffingtonpost: On Earth Day, these photos remind us just how little we know of

huffingtonpost: On Earth Day, these photos remind us just how little we know of

[veins ] [vickili ]

huffingtonpost: On Earth Day, these photos remind us just how little we know of the planet we call home.

more from skleero