Are we wiser about tsunamis? Expert says yes and no

The world may not be well prepared for the next significant tsunami, reports Northwestern University tsunami expert Emile A. Okal in a new study that includes a "wisdom index" for 17 tsunamis since 2004.

Researchers hone technique for finding signs of life on Mars

For centuries, people have imagined the possibility of life on Mars. But long-held dreams that Martians could be invaders of Earth, or little green men, or civilized superbeings, all have been undercut by missions to our ...

Adjusting Earth's thermostat, with caution

A vast majority of scientists believe that the Earth is warming at an unprecedented rate and that human activity is almost certainly the dominant cause. But on the topics of response and mitigation, there is far less consensus.

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