Links for 2008-04-18 [del.icio.us]

• The Color of Plants on Other Worlds (Scientific American)
  On other worlds, plants could be red, blue, even black.
• Looking ahead to "artificial" sperm and eggs (blog.bioethics.net)
  The possibility of sperm or eggs being created from pluripotent stem cells has been a hot topic of discussion in Britain over the last few months.