While biologists have revealed many phenomena that Darwin never imagined—how to discern evolutionary relationships from DNA sequences, for one thing—
Darwin had no understanding of DNA (since it wasn't going to be discovered for nearly 100 years). He significantly underestimated the complexity of life and what it takes to change a living creature. Living things don't just adapt to their envrionment like Darwin thought and then it gets passed down to generations - DNA must change and it doesn't happen from the environment. It happens because God created diversity in existing DNA which allows variety in offsping that can adapt to the environment. The environment selects, it doesn't create.
