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Did comets really fill our planet's oceans, or has Earth's water been here all along?
Some corals are better adapted than others to live through a heat wave.
Selenium shortages coincide with species collapse.
One photographer's glimpse of otherworldly spaces.
Volcanoes and an asteroid made for a deadly team that ended the era of giant reptiles.
Tim Flannery looks on the bright side.
Chemists convert the troublesome greenhouse gas into a valuable resource
Antarctica's ancient ice shelves are melting away.
A look back at some of our most popular articles.
Antimatter can reveal the secrets of the Earth's inner workings.
Zircon crystals could rewrite the history of life on Earth.
Smoky skies are playing havoc with our weather.
What caused Earth's first five mass extinctions?
In Southeast Asia, demand for caged songbirds is decimating wild populations.
What causes this extreme weather event and why is it set to become more common?
Geologists believe unrelieved strain remains within the fault that ruptured in Nepal on Saturday
Drew Turney reviews Planetary.
Scientists disagree over the cause of the massive US snowstorms.
When scientific findings become politicised some will refuse to believe them.
The truth about the Earth's underbelly.
Dating the ancient past in tiny bites.
How grapes ferment into a unique wine is a mystery long cloaked by the term terroir.
Images from the mysterious Arctic craters.
How will China meet its new emissions target?
The IPCC now knows exactly how close we are to tipping into dangerous climate change.
Should the country overhaul the way it views its seasons?
Changes in groundwater could predict temblors.
A debate has opened up over climate sensitivity.
Climate scientists clash over warming waters.