Free Speculative Fiction Online 
(Nature #457, January 2009)
(Nature #458, April 2009)
(Nature #462, November 2009)
(Nature #464, April 2010)
(Nature #466, July 2010)
Ken Liu: To the Stars (Nature #470, February 2011)
(Nature #472, April 2011)
(Nature #477, September 2011)