humans may have the potential to understand this stuff fully, it all might depend on how intelligent we are and what we are willing to learn. About 20 years ago, it was said to be impossible to time travel, well guess what, here were are in 2009 and it is already being mentioned that we could be time traveling in the next century. Or maybe before that. Look how much intelligent the mind has become in the past 100 years, before that people were not very smart.
Have you ever thought how much smarter an average scientist is than me or you?