On Tuesday night's Winterwatch we showed a film that painted a picture of what the UK may have been like when it was covered in ancient forest, including the presence of large predators such as lynx, wolf and bears.
These large predators are long gone... though here at Mar Lodge there were wolves as recently as the 17th Century.
Some people talk about bringing them back, and some European countries have run pilot studies to do just that.
We know that this idea always prompts an interesting debate among our audience, so do use the Comments button below to let us know what you think.
Could - or should - we re-introduce any of our ancient woodland large predators back to the UK?
As ever, we ask you to please respect the opinions of others.