Scientific American Magazine

As human numbers surge toward 10 billion, some experts are alarmed, others optimistic. Who is right?

Samples collected from the ocean floor reveal how the mantle's convective forces shape the earth's surface, create its crust and perhaps even affect its rotation

Researchers can now create mice bearing any chosen mutations in any known gene. The technology is revolutionizing the study of mammalian biology

The author has helped create electronic devices that outperform traditional silicon technology yet remain compatible with standard manufacturing methods

Common sense may rule out such excursions --but the laws of physics do not

Individuals in groups must often choose between acting selfishly or cooperating for the common good. Social models explain how group cooperation arises --and why that behavior can suddenly change

Amphibians seem unlikely desert denizens. But those living in dry climes reveal a diverse and unusual array of adaptations to life at the extremes

Consumers and entrepreneurs....