These are the fruit of the American sweet gum tree. These are commonly referred to as a "space bug", "monkey ball", "dingle ball", "bommyknocker", "bir ball", "gumball" "cukoo-bir" or "sticky ball"(thank you Wikipedia).
These have already dispersed their seeds and fallen to the ground in order to turn into forest compost. Or in this case, a skull, and then forest compost.
Each Tuesday in the 3.0 year will bring a new Tuesday With Tatman. As a tribute to the Skull Master's astounding feat let's all get creative and try something new(and hopefully skull related).