Marilyn Minter at Salon 94
John Chiara's Camera Obsurca Ilfochrome Photography at Haines Gallery

Nu rose a la baignoire at Tyler Wood

Detail of Richard Serra work at David Zwirner, full image can be seen here

Julie Mehretu's delicate and small work at John Berggruen. Graphite, watercolor and ink on paper

The photos are electrical discharges on photographic dry plates. No camera is used. It's electrical sparks on special photo paper. You can read an interview with artist and this process here

Yayoi Kusama at David Zwirner
MacArthur Foundation "Genuis" Award recipient Tara Donovan at Pace

These drawing are made dipping linen in ink then pressed against paper.

Emil Lukas' Small Hallucination #1362 at Hosfelt Gallery. Thread over painted wood frame with nail.