The Strategic Petroleum Reserve exists, first and foremost, as an emergency response tool the President can use should the United States be confronted with an economically-threatening disruption in oil supplies. A Presidentially-directedrelease hasoccurredtwo ...
Scanning electron microscopy images reveal a microscopic, oval-shaped shell with tapered ends, from which an organism’s feet may have extended. The surface of the shell is made up of tiny bits of silica, aluminum and potassium, which the organism likely collected from t ...
The Earth’s Oldest Fossils On a splendid white beach in Shark Bay, Western Australia, I finally found the world’s oldest fossils. They are commonly referred to as living rock, and they have ruled the earth for approximately 3.5 billion years, and continue to live today. No other form of li ...
China is the world's most populous country and the second largest energy consumer behind the United States. Rising oil demand and imports have made China a significant factor in world oil markets. 中国 是世界上 人口最多 的国家， 仅次于美国的 第二大能源 消费国。 不断上涨的石 ...
![[转载]新化石表明全球冻结后的生命迅速恢复](http://image.sciencenet.cn/album/201106/17/0640228z22e2affffid9xf.jpg.thumb.jpg)
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