7 ways the Earth has changed from ancient to modern times
<p>Our cosmic home, planet Earth, has been through a lot over the past 4.5 billion years. Here are some of its most spectacular changes.</p>
<p>Our Solar System formed some ~4.6 billion years ago.</p>
<p><img alt="" src="https://miro.medium.com/v2/resize:fit:700/0*nd9e2li8fhnp2oAb" style="height:473px; width:700px" /></p>
<p><em>Although we now believe we understand how the Sun and our Solar System formed, this early view of our past, protoplanetary stage is an illustration only. Today, only eight planets, with most possessing moons, as well as small rocky, metallic, and icy bodies distributed across various belts and clouds. </em>(<a href="https://aasnova.org/2015/09/09/explaining-the-kuiper-belt-with-a-jumping-planet/" rel="noopener ugc nofollow" target="_blank">Credit</a>: JHUAPL/SwRI)</p>
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