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Humans

From the January 19, 1935, issue

Unusual twin girls, recording brain waves, and making heavy hydrogen.

Planetary Science

A Year on Mars

Catch up with the amazing, ongoing adventures of the rovers Spirit and Opportunity, still ticking on the surface of Mars. These multimedia pages provide maps and routes, images, and accounts of discoveries as the two vehicles explored the Red Planet. Go to: http://www.jpl.nasa.gov/multimedia/mer-year/

Earth

Early Warning: United States to deploy 32 more buoys for sensing tsunamis

On Jan. 14, the Bush administration announced a $37.5 million program to expand the nation's tsunami-warning capabilities.

Tech

Micro Musclebot: Wee walker moves by heart cells’ beats

A new breed of mobile micromachine made of living heart tissue, gold, and silicon takes a step with each rhythmic contraction of its muscle cells.