The Tipping Point
New evidence suggests that we have already passed a dangerous threshold for the amount of carbon dioxide in the atmosphere and that the time for taking strong action is slipping away.
DNA Technology: Discovering New Species
By taking bits of a single gene, scientists are using DNA barcoding to identify new species. If a portable hand-held scanning device can be developed, one ecologist says, it could “do for biodiversity what the printing press did for literacy.”