科学与环境
A dead star's mysterious rings reveal what could happen when our Sun dies
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Astronomers have discovered a strange double ring of planetary wreckage around a dead star, revealing a possible preview of our Solar System's distant future. The two rings are separated by a mysterious gap that researchers believe is maintained by surviving planetary bodies, inc
Astronomers have discovered a strange double ring of planetary wreckage around a dead star, revealing a possible preview of our Solar System's distant future. The two rings are separated by a mysterious gap that researchers believe is maintained by surviving planetary bodies, including one potentially as large as Pluto or the Moon. Their different chemical compositions suggest they may contain the remains of separate destroyed planets.
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Mission blasts off for Mars to grab a piece of its moon
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Two dead after bus crashes in France, officials say
One child and one young adult were killed in the crash, local authorities say, with more injured.
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Human bodies produce 2 billion metric tons of CO2 a year just by staying alive
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