Perhaps it’s the biggest question science has left to answer, how did life begin? Now, molecular biologists in Cambridge university have discovered tiny molecules of RNA which they say might provide some clues. Science journalist and author Philip Ball explains what we know and whether we’ll ever find the origins of life on earth.
A planetary parade, which occurs when several planets appear to align on one side of the Sun from Earth's perspective, will be visible in the UK again from sunset on Saturday.
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