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MESSENGER Spacecraft Resolves Some Mercury Mysteries, and Creates New Ones – Scientific American
Enlarge NASA/JHUAPL/CIW-DTM/GSFC/MIT/Brown University Rendering by James Dickson and Jim Head MORE IMAGES
In March 2011 MESSENGER became the first spacecraft to orbit Mercury. NASA’s satellite has been taking measurements since then, and has collected nearly 100,000 images of the solar system’s smallest planet, and the one closest to the sun.
The image above was created using laser radar to measure surface elevation. It depicts a 1,200-kilometer-long swath of the planet’s northern plains, falsely colored so that darker colors represent lower regions and lighter areas represent higher elevations. The sinuous ridges, cracked craters and an odd bulge (the large whitish area shown on the left) indicate that the four-billion-year-old plains underwent significant distortion after they formed.
Until now many scientists thought Mercury became a geologically dead world soon after its formation. Instead, MESSENGER found several topographic features that appear to have tilted over time, suggesting that Mercury was geodynamically active for a longer period than expected. It may even be active today.
Scientists do not understand the forces that guided the topographic tilting and bulge formation. On other planets, a viscous molten mantle is responsible. But because Mercury has an extremely thin mantle, it is difficult to imagine how it could have transported such vast geologic expanses, researchers say.
Understanding Mercury’s unusual dynamics could help scientists learn more about the formation and evolution of rocky planets.
—By Sarah Fecht
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Tagged American, Creates, Mercury, MESSENGER, Mysteries, Ones, Resolves, Scientific, some, Spacecraft
Some Other Place (poem)
I wander through my memory
The endless trail of what might be
To find a tale of once was me
And things I could or wouldn’t see
Each stumbling step revealed a trace
Another me some other place
Just one more thing I couldn’t face
The seething wounds of my disgrace
Twas more than merely memory
Or something loose I couldn’t place
I thought I saw familiar face
A face impossible to see
It spoke to me about a trace
A tale of all that used to be
When all the world was you and me
And all we did without disgrace
But all that’s gone for now I see
And all that’s left is lonely me
With echoes of what now should be
Now swallowed in a memory
U.S. Postal Service Undergoing Some Major Financial Troubles
The U.S. Postal Service, unbeknownst to many, operates as a quasi-private organization, with an operating budget that it must make the most of and a directive to cover all of its expenses. For years, however, the USPS has struggled to make money as the Internet and private carriers have chipped away at the money-making services it provides. Some have offered conjecture that deliveries will stop on Saturdays in order to cut costs, while still others think the service may go the way of the Dodo bird. Tony Conway, who leads the Alliance of Nonprofit Mailers, notes that if the USPS were to go away, “a lot of people would miss it.”
That goes double for businesses, some of which rely on the post office’s relatively cheap rates to mail massive amounts of correspondence annually. While detractors note that private carriers could pick up the slack if the USPS went under, there are various parts of the country that receive no private carriers, and are reliant on the service to receive mail.
Postmaster General Patrick Donahoe has been struggling for a while to keep the USPS afloat, but he insists that the organization is not going under. A spokesman for the service noted, “The Postal Service is not going out of business. We will continue to deliver the mail as we have for more than 200 years. The postmaster general has developed a plan that will return the Postal Service to financial stability. We continue to do what we can on our own to achieve this plan and we need Congress to do its part to get us there.”
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House GOP share some ground with Obama on jobs (AP)
AP – House Republican leaders are offering President Barack Obama an opening for compromise on measures that would spur job growth. They say neither Republicans nor the administration should consider their own initiatives “an all-or-nothing situation.”
Yahoo! News: Top Stories

