HOWARD LIPIN / Union-Tribune “People should walk away from this concert, possibly for the first time, being cognizant of the power of the bass,” says Marshall Hawkins (far right), who performs tonight at Dizzy's with fellow bassists (from left) Bob Magnusson, Danny Weller, Mark Dresser, Kristin Korb, Bertram Turetzky and Rob Thorsen.

Three bassists are walking down the street. No, really. The three – Mark Dresser, Kristin Korb and Rob Thorsen – will perform tonight at the all-ages Dizzy's downtown. They will be joined on stage by fellow bassists Bertram Turetzky, Marshall Hawkins, Bob Magnusson and Danny Weller.

• Talent is their ticket to explore the bass

Photography, from the start, was part art and part science. For centuries, people had dreamed of pictures without using a pencil or a brush. But it wasn't until the 1820s and 1830s that the interaction between light, chemicals and picture surface was understood sufficiently to yield an image.