If that is correct, the arm, which is fitted with a scoop and a second camera, should be able to dig into it, photograph its details, and bring samples back into the main body of the probe for analysis.

ECONOMIST: Space exploration

If that is correct, the arm, which is fitted with a scoop and a second camera, should be able to dig into the permafrost, photograph its details and bring samples back into the main body of the probe for analysis.

ECONOMIST: Exploring Mars

But analysis of the motion of Ulysses, another space probe, has shown that it, too, is affected by the mysterious acceleration.

ECONOMIST: A space oddity