Mat Brown is an industrial designer and jewelry maker in Norwich, UK. He wanted to do something productive with a long piece of chestnut wood that he owned. It was heavily cracked and had knotholes, so some woodworkers might choose to avoid it.
But Brown had a plan. He mixed resin with glow-in-the-dark powder and poured it into the cracks and holes. He then varnished it with 8 or 9 coats of a linseed oil solution. Brown made the now elegant board into a lovely set of shelves that glow under black light. You can see more pictures of this beautiful project here.