Many non-Christian scientists look at Genesis 1 and the order of events in the six days and claim that it is all wrong.
For example, why did Genesis put the plants on the continents before the animals in the ocean when the fossil records seemed to have put it the other way round. Another one will be how Genesis talks about the sea mammals in day 5 but not land mammals until day 6.
According to Dr. Hugh Ross, these scientists are overlooking the actual isotopic and fossil evidence that demonstrates Genesis' accounts. The book of Job (chapters 36, 37, 38 and 39) also gives us details about the 6 days of creation that were not outlined in Genesis.