Not too much different than what Darwin said...<quoted text>
Science doesn't FULLY have the answers yet. They probably will within our lifetimes.
When Darwin wrote about natural selection in "Origin of Species," he noted that the actual fossil record did not support this theory. Darwin thought that future discoveries would vindicate his theory. He was wrong, here is how he explained it...
"The geological record is extremely imperfect and this will to a large extent explain why we do not find intermediate varieties, connecting together all the extinct and existing forms of life by the finest graduated steps. He who rejects these views on the nature of the geological record, will rightly reject my whole theory."
Today, about 120 years later, the fossil record has been greatly expanded, we now have millions of fossils representing over a quarter of a million species and we have fewer examples of evolutionary transition than we had in Darwin's time, and even when new ones are found, they are frequently controversial and seem to be more of a figment of someone's imagination than a transitional species.