Because of the effects of sin, mistakes have added up in the genes of humans so that today, deformities could result from close relatives marrying. A… - Ken Ham

The answers from Genesis tell us that there was no death, bloodshed, disease, or suffering before sin. All these things are a consequence of sin. That's why Christians can't believe in millions of years for the fossil record - it's a horrible record of death, disease, and suffering, which couldn't have happened in the Garden before Adam fell.

Most of us tend to think of Noah as much less advanced than we are. Actually, the opposite would be true. We've had 4,500 more years of the effects of sin and the Curse on our brains. I'm convinced Noah would have had the intelligence necessary to devise methods of feeding and caring [for the animals on the ark] that would put today's farmer's to shame. If farmers today have methods that could easily allow eight people to look after 16,000 animals - I've no doubt Noah could do much more!

When it comes to biblical authority, the question of the age of the earth is just as vital as the question of whether evolution is true or not. The chronologies in the Bible and the length of the days of the Creation Week (they were 24 hours each) show that the earth is young. Why try to reinterpret the very clear teaching of Scripture to accommodate the fallible ideas of man that say the earth is old? Such reinterpretations undermine the authority of the Word of God.