Mars had an oxygen-rich atmosphere around 4 billion years ago
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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Lurch, a Watusi bull, had the largest horns in the world.
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Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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