A new system for mapping carbon dioxide emissions in the U.S. will help regulators figure out exactly where these emissions are coming from and how best to reduce them. Among human-produced gases that contribute to climate change, carbon dioxide is public enemy number one.

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A few months AGO, when researchers analyzed the genome of the devastating 1918 influenza, they found it to be a direct descendant of a common bird-flu strain, with just a few disparate amino acids here and there. The finding cast a chilling new light on the most lethal modern bird flu, known as H5N1, which has already killed at least 70 people in Asia but isn't transmissible between humans—yet.

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