Deciphering the link between nature and nurture
Raindrop pockmarks may provide clue to the density of Earth's atmosphere 2.7 billion years ago when the Sun was 30 percent dimmer than today.
The legacy of "Brian Tinsley's clever wife"
Tourists are only encouraging a dubious Vietnamese tradition.
Hear author Michio Kaku interviewed by Vittorio Maestro, Editor in Chief of Natural History. (MP3, 19 minutes)