Astronaut Scott Kelly’s shrinks back to normal height after returning from year in space

Expedition 46 Commander Scott Kelly of NASA smiles upon arriving at Ellington Field, Thursday, March 3, 2016 in Houston, Texas, after his return to Earth. The Soyuz TMA-18M spacecraft landed near the town of Dzhezkazgan, Kazakhstan, on Wednesday with Kelly and Russian cosmonauts Mikhail Kornienko and Sergey Volkov of Roscosmos. Kelly and Kornienko are completing an International Space Station record year-long mission to collect valuable data on the effect of long duration weightlessness on the human body that will be used to formulate a human mission to Mars. Volkov is returning after six months on the station. (Joel Kowsky/NASA via AP)

(CNN) Well, that didn’t last long.

Astronaut Scott Kelly, who grew about 2 inches during his nearly one year stay on the International Space Station, is back to his normal height, his identical twin brother, Mark, said Thursday.

Scott Kelly, whose spine elongated while he spent 340 days in space, took less than two days to shrink.

Mark Kelly, a former astronaut, told CNN’s “Erin Burnett OutFront” by email that the two went back-to-back an hour after his brother returned to the United States early Thursday.

Scott grew 1½ inches before returning to normal, he said.

Scott Kelly landed in Kazakhstan on Wednesday morning, and arrived in Houston to hugs and American treats a day later.

There he was welcomed by his twin, second lady Jill Biden and various NASA officials.

Biden brought the astronaut some beer and apple pie.

“Nothing’s more American than that,” she said. “… That’s what he said he wanted.”

‘It’s great to be back’

Scott Kelly, 52, attributed the success of his year in space to his NASA colleagues, family and friends.

“It’s great to be back in Texas, on U.S. soil … on planet Earth,” he said.

“This is not my achievement. It’s NASA’s achievement and it’s our country’s achievement. … There’s no greater privilege than serving your country however and wherever you might do it.”

In a phone call, President Barack Obama applauded him for his record-breaking yearlong mission.

In a statement, the White House said, “Kelly’s year in space would provide critical data to researchers trying to understand how to keep astronauts healthy during long space voyages and fulfill the President’s vision of putting American astronauts on Mars in the 2030s.”

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