December 10, 2007— At nearly $800 per kilo, saffron is the world's most expensive spice. More than 150 purple flowers go into each gram of the deep-red saffron strands.© National Geographic (AP)
Get our news delivered directly to your desktopfree.
How to Use XML or RSS
SPACE PHOTOS THIS WEEK: Tiny Galaxy, Sun's Iron, More
Stuck Mars Rover About to Die?