Scientists have built from scratch the world's first synthetic chromosome of a eukaryote, incorporating it into brewer's yeast.
Concerns about a salmonella outbreak at a California chicken production plant could cause it to shut down. The incident raises questions about how federal agencies handle salmonella outbreaks.
ConEd said New York City customers served by underground equipment should see electricity restored to service in four days. Those who get power from overhead lines are expected to wait a week. Why will it take so long?