Researchers long ago rejected the theory that vaccines cause autism, yet many parents don't believe them. Can scientists bridge the gap between evidence and doubt?

The US Fish and Wildlife Service is charged with using the "best available science" to manage endangered species. But a scientific review panel found "fatal flaws" in agency models used to regulate development in the habitat of the critically endangered Florida panther. What happened?

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Many key species of the Antarctic marine ecosystem--including krill, the backbone of the food chain--depend on the availability of winter sea ice. If global temperatures continue to rise and the winter ice pack continues to recede, this fragile Antarctic marine ecosystem could face collapse

Americans have long worried about conflicts between scientific and religious beliefs. For the most part, this ambivalence has not threatened the practice and teaching of biology--until recently.