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Meteorite: from a time before the Earth
How old can a rock be? Quite old, is the answer. This one was formed before the Earth itself...
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Fossils at Carsaig Bay
On Mull's south-west coast, if you can drag your eyes away from the glorious scenery, you'll find a wealth of Jurassic treasures beneath your feet
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Ardnamurchan’s volcano
There can't be many places in the UK where you can drive through the magma chamber of an extinct volcano...