More from Jeff Hecht
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How Pluto lost its planethood
Culture
Earth
Organic pollutants tracked down to US parking lots
News
Earth
Why mammals grew big 鈥� and then stopped
News
Environment
Did giant pterosaurs vault aloft like vampire bats?
News
Life
History’s biggest lungfish pops up in Nebraska
News
Technology
3D holograms enter the fourth dimension
News
Best of the Ig Nobel prizes 2010
News
Technology
Work light twice as hard to make cheap solar cells
News
Life
Trademark swimsuit gave penguin ancestors the edge
News
Health
Scratched glasses give perfect vision for any eyesight
News
Physics
US assessment of terrorist threats poor, says panel
News
Technology
Zeros to heroes: The long wait to speak in code
Features