I can't resist starting this week's link list with a reference to Star Wars:
Tatooine-like planet discovered
Researchers discover gene linked to optimism, self-esteem
50 New exoplanets discovered by HARPS
Astronomers find extreme weather on an alien world
Researchers predict new superhard materials
Students create application that "writes" books
(Don't worry; I think this app is a long way off from writing fiction)
Blood vessels from your printer
Sea urchins see with entire body
I found all of these articles on Science Blog.
Have a good weekend, everyone! Tomorrow we plan to take our son to the local railway museum; on Sunday, we'll go apple picking. Hope you have something fun planned too!