Genesis
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Christian Response
-SAB answered

Genesis 8:7

And he sent forth a raven, which went forth to and fro, until the waters were dried up from off the earth.

The flood story in Genesis is confusing to read. The clean animals go into the ark by twos (6:19-20, 7:8-9) and by sevens (7:2). The flood lasts for forty days (7:17) and for 150 days (7:24, 8:3). Noah sends out a raven (8:7) and a dove (8:8).

Why doesn't Genesis get its story straight? Because there were two separate accounts that were (somewhat clumsily) interwoven.

Wikipedia

Noah's Ark: Textural Analysis

Documentary Hypothesis

Hawaiian Astronomical Society

Constellations: Columba -- Bringing a sign of Peace