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You can now watch astronauts eating tasty space lettuce in 4K

Earlier this week, the internet thrilled to the sight of astronauts onboard the International Space Station chomping on red romaine lettuce — the first time people have eaten food actually grown in space. The experiment was a success, with astronaut Scott Kelly noting that the produce tasted like arugula, and NASA has now released footage of the whole event in 4K. The video strikes a different note to the usual footage of rocket launches and space walks, but in the right context, it's just as notable. Growing food in space is necessary for any long-duration mission, and this week's experiment — although it might just be a salad — actually paves the way for further exploration of our Universe.