Column: They gain new insights on black holes and distant nebulas by tracking the path of stars and interstellar gases.
To improve results, new search engines rely on users instead of computers.
Observation wheels, larger versions of the Ferris wheel, have become popular landmarks around the world. China will set a record in 2009.
Data from popular navigation aid helps police. What about privacy?
Scientists and engineers are racing to replace the out-of-date space shuttles, and the debate over the best option centers on these two designs:
Scientists have made silicon chips stretch into any shape.
Some predict that within five years, it could rival fossil-fuel energy.
Once thought to be waste, rice husks now can be used as clean, cheap fuel for developing countries.