US artist embarks on century project

Photographs capture fleeting moments in time, but what would be revealed if an image could show an entire century?

That is the question behind the latest "thought experiment" by the American conceptual artist Jonathon Keats, whose past endeavors include a bid to genetically engineer God, and porn films for houseplants-complete with close-ups of bees pollinating flowers.

Using ultra-long-exposure cameras, he has set out to document Berlin's shifting urban landscape over the next 100 years.