Physics
Get ready for the leap second – it could be the last one ever
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Life
Self-confidence school: Can you really fake it to make it?
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Hubble at 25: The most inspirational images from space
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Earth
What is making mysterious fairy circles appear in the desert?
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Space
How New Horizons will probe mysteries of Pluto's oddball moons
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Health
Why learning in your sleep is an idea that's reawakening
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Space
Dwarf or planet? First visit to Pluto could reignite the row
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