Genesis 8:9

But the dove found no rest for the sole of her foot, and she returned unto him into the ark, for the waters were on the face of the whole earth: then he put forth his hand, and took her, and pulled her in unto him into the ark.

1. The Dove returned to Noah's hand and he brought her back into the ark.
2. Doves like a solid suface. They don't live in trees or on the water.
3. The dove's action told Noah that the earth was still covered with water.
4. Noah understood doves.
5. Knowledge is important. You never know when some fact will be helpful.