Cities are finding beneficial and lucrative ways to dispose of solid waste, while also helping farmers. But a lot of sewage still ends up in landfills or being processed at big, industrial incinerators.
Infants received different levels of oxygen to see which was better at preventing blindness without increasing the risk of nerve damage or death. But the federal government says doctors in the study didn't tell parents enough in advance about the "foreseeable risks" to their children.
Both fruits are vulnerable to a nasty disease called fire blight that can devastate orchards. So organic labeling standards allow for antibiotics to be used on apple and pear trees. That exemption is set to end in 2014 — but growers say they need a little more time.
Researchers put some old elixirs and pills in the Henry Ford Museum's large collection of patent medicines to a modern test. They found a mix of potentially harmful metals like lead and mercury along with benign ingredients, including calcium and iron.
Drug companies have developed several Alzheimer's drugs that seemed to work in mice, but did not help people with the disease. So scientists have created a rat with human genes in hopes of getting a better model for testing the drugs.
Melissa Block talks with researcher Thore Bergman about his findings that a rare type of Ethiopian monkey, the gelada, makes a human-like sound that could offer insights into the evolution of human speech.
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