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Latest Cathy Weitz Stories

2008-09-27 09:00:17

By AARON MACKEY Mars may have had water coursing through its red soil for a billion years longer than scientists previously had thought, increasing the possibility that the planet could have supported life, research conducted by a Tucson-based institute shows. Using high-resolution images from a camera developed at the University of Arizona, researchers with the Planetary Science Institute examined soil deposits on plains that surround a vast canyon network that runs around the planet's...


Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.