NASA's Phoenix spacecraft will hit the Martian atmosphere on Sunday at 12,600 mph, then start a plunge through frictional heat that will build to 2,600 degrees, Florida Today says this morning, in a story about the special challenges of a Mars mission. Photo illustration, Florida Today/NASA via Newseum.Cutlines Only showcases Gannett website art. E-mail suggested links here; see Tipsters Anonymous Policy in the green sidebar, upper right. Or leave a note in the comments section, below.
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