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Sea ice responds to changes in winds and ocean currents, sometimes with origins thousands of kilometres away. NASA/Nathan Kurtz

Why Antarctica’s sea ice cover is so low (and no, it’s not just about climate change)

Antarctic sea ice cover fell to an all-time low recently and hasn't yet recovered. Why? The initial answers could lie in an unlikely place – the tropics.

Curious Kids: do ants have blood?

Ants have something similar to blood, but it's called haemolymph. Some insects use it in unusual ways. When threatened by a predator, blister beetles can squirt haemolymph from their knees.

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China’s concerns about air pollution from burning coal is one reason behind the emissions slowdown. China coal image from www.shutterstock.com

Fossil fuel emissions have stalled: Global Carbon Budget 2016

For three years, carbon emissions from fossil fuels have grown little or not at all, opening a window of opportunity to halt climate change.

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