He then gradually puts on the make-up and costume so they can see him become Popol before being invited to join him in the ring to interact without a show going on.

BBC: Scary clown mask

In the "Ring, " four Wagner tubas join an enlarged brass section that includes other orchestral rarities like the bass trumpet, contrabass trombone and contrabass tuba, creating "choirs" of gleaming brass.

WSJ: It Takes Brass to Play the Wagner Tuba | By Barbara Jepson | The Ring of the Nibelung

As this ring moves along the rod, it picks chemical units and assembles them into chains, just as ribosomes join up the building blocks of proteins.

BBC: Tiny molecular machine apes cellular production line