I am still following this thread, too.
When I was at school, our Science teacher came into class one day. He had a massive piece of paper, with a sort of 'foot looking' drawing on it.
He stated that when he woke up the day before, and looked in his garden, he saw this 'foot looking' thing, shaped in the mud, and he drew it, so we could see. His questions was, what was it, and how did it get there?
The purpose of this exercise was to get us all thinking, and suggesting ideas. This thread reminds me of those few days in class.
Regardless, I will be tuning in tomorrow for the results