By Rebecca Morelle, Science reporter, BBC World Service
Microbes that can withstand tough conditions could be the last life on Earth
The last surviving creatures on Earth will be tiny organisms living deep underground, according to scientists.
Researchers used a computer model to assess our planet's fate billions of years from now.
They found that as the Sun becomes hotter and brighter, only microbes would be able cope with the extreme conditions that the solar changes would bring.
The research is being presented at the National Astronomy Meeting.
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