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36 Amazing Art Shows This October in Guangzhou
The exhibition focuses on the latest discoveries and achievements from 20 archaeological excavation projects in Guangzhou in ...
4 天
《科学》(20240927出版)一周论文导读
▲摘要:陆地光合作用每年清除的二氧化碳量是化石燃料排放的6倍。然而,通过分解后大部分的碳回到大气中。我们在地下2米处发现了一根3775年前的古原木,它的保存时间远远超过预期。这根木材保存得近乎完美,与现代样品相比,碳损失不到5%。它没有腐烂的原因可能是埋藏地点致密粘土的低渗透性。
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