Earth is the fourth-smallest of the planets—though, in terms of the rocky planets, it's the largest—but it's the densest. Jupiter is the largest planet in the solar system, but it's Saturn—the solar system's second-largest planet—that takes the prize for least dense.
If Earth's history were condensed into 24 hours, life would have appeared at 4 am, land plants at 9:52 pm, dinosaur extinction at 11:41 pm, and human history would have begun at 11:58:43 pm.
Rainbows are actually circular. We don't typically see a full circle rainbow because the Earth's horizon blocks the lower part.
If the earth didn't have the moon, our days would only be 6 hours long.
Earth is the densest planet in the Solar System.