The outer layer or region of a sphere or spherical structure, particularly used in describing layers of the Earth or organisms.
From Greek 'ektos' (outside) and 'sphaira' (sphere), literally 'outside sphere.' A geological and biological term for outermost regions.
The ectosphere of Earth includes everything we live in and see—the atmosphere, oceans, and landforms—while the deep inner layers remain mysterious and mostly inaccessible to us!
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