Amazon Building Workplace of the Future With New HQ's Biospheres

Walk down Seventh Avenue in downtown Seattle and you can't miss them: three gigantic spheres resembling melted-together Milk Duds rising in the shadow of Amazon's new 500-foot-tall office tower. The architectural oddity has already become a tourist attraction and social media phenomenon. Passersby snap photographs and watch construction crews attach glass panes to the steel frames. Images stream through Instagram and Twitter.