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探寻地球的起源:地球是如何诞生的?
地球的诞生离不开太阳系的形成。大约在46亿年前,太阳系的形成始于一个巨大的分子云。这些分子云主要由氢、氦及少量重元素组成,经过重力的作用,逐渐坍缩形成了一个旋转的盘状结构。
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今日热点
Tapped for health secretary
Charged over Capitol riot
18 states sue SEC, Gensler
To run Interior Department
FBI offering up to $25K
OH trans bathroom bill
Named grand marshal
Ben & Jerry's sues Unilever
Vonn ending her retirement
E. coli cases climb to 104
Bohannan requests recount
To close hundreds of stores
IN gender-affirming care ban
DOJ report on Fulton jail
To replace Kotb on 'Today'
Judge blocks name change
Military suicides increased
Faces up to $165M penalty
Alleged ISIS support charge
New Jersey forest fire arrest
China hacked telecom firms
Seeks pause in docs appeal
CDC: OD deaths down
Israeli airstrikes hit Syria
NYC reviving congestion fee
House GOP conference chair
Leonid meteor shower
Tropical Storm Sara forms
EU fines Meta
Bed rails recalled
Weekly jobless claims fall
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