It is pretty interesting in genetics.  Scientists (including secular scientists) have looked at mutations in the mitochondrial DNA that is passed down from mother to child through the egg.  Their calculations say the first female mitochondrial DNA was about 7,000 years ago (awfully close to the Bible's 6,000 but based on assumptions that might not be accurate).  They also looked at mutations in the Y chromosomes passed down from father to son.  These calculations came out to 4,500-5,000 years which is about the length of time since the flood.

Since the men on the ark were Noah and his 3 sons, you would expect all Y chromosomes to go back to Noah ~4,500 years ago.  Since the women on the ark were 4 unrelated women (Noah's wife and each of his son's wives), you would expect their mitochondrial DNA variation to trace back to Eve ~6,000 years ago.  Science matches the Bible.