Fish are at a far greater risk from climate change than previously thought. In a worst-case scenario of 5°C of global warming, up to 60 per cent of fish species around the world would be unable to cope with temperatures in their current geographical range by 2100 (Science, doi.org/d2xm). Diamond, one of the hardest known materials, could have a rival. A new theoretical form of carbon called pentadiamond is just as hard as the gemstone but as light as pencil graphite, and could theoretically be used for storing gas (Physical Review Letters, doi.org/d2xn).
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