[Magazine] Scientific American. 2011. Vol. 305. No 5

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Extra info for [Magazine] Scientific American. 2011. Vol. 305. No 5

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In situations like these, it can be helpful to explore the mind itself and to look scientifically at the sources of our own and others’ philosophical intuitions. This is where experimental philosophy comes in. The key idea is that if we can get a better understanding of the psychology behind philosophical intuitions, we can have a better sense of which intuitions are worthy of our trust and which we should dismiss as unreliable or misleading. This work, we hope, will give us a better understanding of people’s beliefs about the great philosophical issues.

Mars Phoenix made it to just inside the Martian Arctic Circle. Reaching the surface safely is no easy feat. The atmosphere is thick enough to require a heat shield but not thick enough to slow a parachute to touchdown speed. Phoenix, Viking and the short-lived Soviet Mars 3 lander fired rockets for their final descent; Sojourner, Spirit and Opportunity bounced down on air bags; and Curiosity will be lowered down by a skycrane. Phoenix Heat shield is discarded, and air bags inflate Rockets ignite, and bridle is cut Viking 2 Viking 1 Sojourner Opportunity Curiosity (planned) Spirit Mars 3 Air bag package lands, rolls or bounces, deflates, and retracts: lander unfolds SOJOURNER VIKING 1 VIKING 2 MARS 3 Final data transmission Launch Land VIKING 1 1970 MARS 3 1975 VIKING 2 32 Scientific American, November 2011 1985 1990 Illustration by Gavin Potenza © 2011 Scientific American STEVE LEE University of Colorado, JIM BELL Cornell University, MIKE WOLFF Space Science Institute AND NASA (Mars base map) RADAR FEVER we unpacked the spacecraft.

As a child, he virtually explored the solar system as an avid science-fiction reader. Turning this early love into an avocation, he has worked on some of the most famous robotic planetary missions, from the Pioneer 11 deep-space probe to the So­journer, Spirit and Opportunity rovers. Last year NASA awarded him the Exceptional Scientific Achievement Medal. T The size of a small car, the rover (named Curiosity) will spend a Martian year exploring the base of the central peak in the crater, thought to be the oldest section.

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