If you have a question you’d like an expert to answer, send it to [email protected]. Are people on the South Pole walking upside down from the rest of the world? – Ralph P., U.S.

Feb. 9, 2010 -- When Navy Commander Scott Shackleton stepped off a C-130 aircraft and set foot on the South Pole today, he set a family record.

If you have a question you’d like an expert to answer, send it to [email protected]. Are people on the South Pole walking upside down from the rest of the world? – Ralph P., U.S.

An astrophysicist who spent time doing research at the South Pole gets to the bottom of how things feel at the ends of the Earth.

To understand what’s happening, and why things are really different but also feel very much the same, it might be useful to ...