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immune system

Mars rover may not escape sand trap for weeks

Space

Mars rover may not escape sand trap for weeks

NASA's Spirit rover is stuck in the sand up to its hubcaps, and a quick escape does not look likely

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Solar cycle will be weakest since 1928, forecasters say

Earth

Solar cycle will be weakest since 1928, forecasters say

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Could flowers bloom on icy moon Europa?

Life

Could flowers bloom on icy moon Europa?

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Nearby asteroid found orbiting sun backwards

Space

Nearby asteroid found orbiting sun backwards

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Mysterious spokes found in crater on Mercury

Space

Mysterious spokes found in crater on Mercury

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Sun damage conceals asteroids' true ages

Space

Sun damage conceals asteroids' true ages

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Salt in Enceladus geyser points to liquid ocean

Space

Salt in Enceladus geyser points to liquid ocean

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Titanium reveals explosive origins of the solar system

Space

Titanium reveals explosive origins of the solar system

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What to see in the sky this week

Space

What to see in the sky this week

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Solar 'double vision' aids space weather warnings

Space

Solar 'double vision' aids space weather warnings

Imaging from a pair of satellites means space weather forecasters can predict dangerous solar plasma "burps" 24 hours before they hit Earth

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Earth

Earth may have largest ripples in the solar system

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Space

Titan's squashed shape hints at soggy interior

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Space

Subsurface ice on Mars exposed by recent impacts

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Life

Firm vows to grow first flowers on the moon

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