How DNA testing can rip families apart -- and bring them together

Two women from shattered homes have been using DNA tests to discover why they have always felt like outsiders. They find each other on a social network for people who want to compare their genomes — and they get a match. Are they related? Did their parents have an affair? New DNA services promise to help them find out. »9/30/13 1:51pm9/30/13 1:51pm


The book about earthworms that took Charles Darwin 44 years to write

For most of his adult life, Charles Darwin was mulling over the earthworm question. In the years before his famous adventure on the H.M.S. Beagle, he began investigating how these creatures creates soil-enriching mold during their digestive process. Off and on in the decades after that, he continued to ponder… »1/23/13 7:50pm1/23/13 7:50pm