Olafur Eliasson has a great exhibition on view in Chelsea at Tanya Bonakdar Gallery the best parts were the installations upstairs, the water sculptures and the obsidian.
"Your disappearing garden" 2011
"Object defined by activity, now" 2009
"Object defined by activity, then" 2009
"Object defined by activity, soon" 2009
Olafur's TED Talk: Playing with space and light