When you're an archaeologist, you don't know what you're going to discover until you have the right finds in front of your eyes.

Will your next dig uncover a secret from the past that will overturn everything we know about the people who lived thousands of years ago? Or will you return empty handed?

If you ask an archaeologist what he thinks is still waiting to be discovered, he may respond cautiously at first. But if you're a little more curious, many of them finally admit that they have a professional wish list in mind; Objects and works they would like to pull out of the ground one day.

The BBC discussed this question with two archaeologists. Their answers show that if these exciting discoveries are made one day, they could challenge many of our beliefs about the past.