SCIENCE IN THE NEWS WEEKLY
On Mars, Ice and Salt
An electrical short in the Phoenix Lander's mechanical arm delayed its exploration of the Martian north pole last week, but new photos on Saturday revealed that the spacecraft's thrusters had uncovered a large patch of ice, which is exactly what scientists hope to sample and analyze.
But the planet may be too salty to support life as we know it. At least that is the conclusion of a study of minerals near the Martian surface in the Meridiani plain. The rover Opportunity discovered ancient deposits of magnesium sulphate there that appear to have been left behind by salty water.
Even beyond our system, there may be many Earth-like planets in the cosmos. A four-year study of 400 stars found that as many as 30 percent possess close-in, relatively small planets with some Earthly characteristics.
And an amateur stargazer has been credited with discovering the fastest rotating natural object in our solar system. The space rock, as big as a house, spins once every minute. It zoomed past earth in April.
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VIDEO: The Promise and Peril of Drones
The automation of tasks at work and at home is just around the corner, including driving cars, piloting planes, delivering packages, and transporting weapons. Unmanned aerial vehicles are rapidly evolving to meet both society’s and the military’s needs in automation and better efficiency.
During her time as one of the first female fighter pilots in the US Navy, Dr. Missy Cummings observed that computers could take off and land a plane more precisely than humans. Because of this breakthrough and her fascination with this growing technology, she began human–drone interaction research.
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