Features

• The Neurobiology of Trust

  Our inclination to trust a stranger stems in large part from exposure to a small molecule known for an entirely different task: inducing labor

  Paul J. Zak   | June 1, 2008  |

• The Ethics of Climate Change: Pay Now or Pay More Later?

  Weighing our own prosperity against the chances that climate change will diminish the well-being of our grandchildren calls on economists to make hard ethical judgments

  John Broome   | June 1, 2008  | 68

• The Tunguska Mystery

  Finding a piece of the elusive cosmic body that devastated a Siberian forest a century ago could help save the earth in the centuries to come

  Luca Gasperini , Enrico Bonatti and Giuseppe Longo   | June 1, 2008  | 5

• What Is a Species?

  To this day, scientists struggle with that question. A better definition can influence which animals make the endangered list

  Carl Zimmer   | June 1, 2008  |

• Does Time Run Backward in Other Universes?

  One of the most basic facts of life is that the future looks different from the past. But on a grand cosmological scale, they may look the same

  Sean M. Carroll   | June 1, 2008  | 76

• New Breast Cancer Treatments Help Sufferers Gain Ground

  The newest targeted therapies are helping doctors to tailor increasingly effective treatments to individual patients

  Francisco J. Esteva and Gabriel N. Hortobagyi   | June 1, 2008  | 1

• Digital Forensics: How Experts Uncover Doctored Images

  Modern software has made manipulation of photographs easier to carry out and harder to uncover than ever before, but the technology also enables new methods of detecting doctored images

  Hany Farid   | June 1, 2008  | 10