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An Asteroid Sample Is Full of Surprises

Sealed for years on its way back to Earth, a handful of dust contains chemistry that nobody expected to find.

A rock that looks like it is made of rocks

2 min read

The capsule was opened in a clean room with the care usually reserved for ancient manuscripts, and the first analysis has already forced a rewrite of two well-regarded theories.

The mission

It takes years of planning and thousands of people to reach a moment like this, and then, when it finally arrives, it mostly looks like a small group of engineers staring at a screen. The first signal came through a few minutes later than expected, long enough for the room to go very quiet indeed.

We asked for a spoonful of rock, and got a chemistry lesson.

What they found

The early data is exciting precisely because nobody yet knows what to make of it. Teams on three continents have started the slow work of checking the instruments, ruling out errors and arguing over what they might be looking at. In discovery, the most useful phrase is often simply that it looks a little odd.

Where it goes from here

Exploration has also become cheaper and far more crowded. Launch costs have fallen sharply, small research groups can now afford their own instruments, and universities that once had to wait a decade for access can now get their results in months. A far wider range of people now get to ask the questions.

There is still a long way to go. Findings will need to be replicated, and missions will fail, as they always have. But each new image and sample widens the map a little, and the people doing this work say that the best part of the job is how often it turns out that they were asking the wrong question.

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