Nature

The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity. The atmosphere of …

A leaf (plural leaves) is a dorsiventrally flattened organ of a vascular plant and is the principal lateral appendage of the stem, usually borne above ground …

Time is the indefinite continued progress of existence and events that occur in an apparently irreversible succession from the past, through the present, into …