scienceduck:
Yo-Yo-Marble Animation (see orginal size for animation)
scienceduck:
marble swirl super close-up
scienceduck:
Proof that I've lost my marbles
scienceduck:
marbles
scienceduck:
It's good to be different
scienceduck:
the line-up
scienceduck:
a study in light and shadows