Life
1.6-billion-year-old steroids may be traces of earliest complex life
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sea life
Environment
Ozone layer treaty pushed back ice-free Arctic summers up to 15 years
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Life
The hunt for the South Island k艒kako, New Zealand鈥檚 long-lost bird
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Life
Why the origins of life remain a mystery 鈥 and how we will crack it
Features
Environment
Antarctic ice melt may be reversible due to rising land beneath
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Life
Surprising culprit found that killed 95% of a sea urchin population
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Life
Kelp forests capture nearly 5 million tonnes of CO2 annually
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Space
What are the prospects for life on the icy moons Europa and Enceladus?
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Life
Mysterious deep-sea holes may be burrows of tiny shrimp-like creatures
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Life
How did multicellular life evolve? Algae and yeast give some hints
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Earth
Oxygen on early Earth may have come from quartz crushed by earthquakes
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Physics
Stephen Hawking's final theorem turns time and causality inside out
Features
