• A Jan 27 Real Dirt column about growing tomatoes on Mars mistakenly said that the Russian scientists were currently growing wheat on their space station MIR. Although experiments were carried out, MIR closed in 2001. Similar tests are now ongoing on ISS, the International Space Station.

• Alexandra Basen is a Toronto-based researcher. A Jan. 21 article about industrial designer Stephanie Sonya Ibbitson misspelled Basen’s surname.

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