Space
Smoke-detector isotope to power space probes
The European Space Agency wants a radioactive isotope commonly used in smoke alarms to power its robotic spacecraft to the outer solar system
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The European Space Agency wants a radioactive isotope commonly used in smoke alarms to power its robotic spacecraft to the outer solar system
NASA's Spirit rover was already fighting an uphill battle to escape a sand trap; if a second wheel cannot be coaxed back into action, the rover may freeze to death