Blogs in May 2013

Antarctica 2012--2013 Part 9/9

[Note: This is the last in a series of posts adapted from emails I wrote while traveling to the South Pole for research in 2012--2013.]

This is the last entry from the South Pole. I just bag dropped for the flight back to McMurdo tomorrow (Jan. 4). The procedure here is even simpler than at McMurdo. The bag drop is at "Destination Zulu," the rear entrance of the station, so there's no need to drag bags outside. The cargo crew takes care of weighing so all you have to do is put a tag with your name on your bags and leave them there.

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New Results from AMS, Speculation on Dark Matter

Photo of AMS on International Space Station

Last month the Alpha Magnetic Spectrometer (AMS) team reported a new measurement of positrons in cosmic rays (journal article, less technical summary and commentary). The results imply that new, not yet understood physical processes are producing more positrons than expected at high energies.

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