(AP) -- A worldwide scientific effort to catalog every living species has topped the 1 million milestone. Six years into the program the total has reached 1,009,000, researchers report. They hope to complete the listing by 2011, reaching an expected total of about 1.75 million species.
Content from The Associated Press expires 15 days after original publication date. For more information about The Associated Press, please visit www.ap.org .
Explore further: Front-row seats to climate change