Astronomers have uncovered evidence that a star that was as bright as the full moon exploding into view 340,000 years ago, emitting dazzling radiation that could have disrupted Earth's protective ozone layer and sunburned our Stone Age ancestors.
that a star that was as bright as the full moon exploding into view 340,000 years ago, emitting
that a star as bright as the full moon exploded into view 340,000 years ago, emitting
of a star that was as bright as the full moon exploding into view 340,000 years ago and that it emitted
of a star as bright as the full moon, exploding into view 340,000 years ago and emitting
of a star as bright as the full moon that exploded into view 340,000 years ago and that emitted
of更像是在修饰star本身,而不象在说整个star的状况
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