8,283 results
8,283 results for: Fish
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- Earth
Hammered Saws
Sawfish, shark relatives that almost went extinct several decades ago, have now gained protection by international treaty.
- Humans
The Wealth of Nations
Analysis of the connections among different types of economic activities explains why some countries succeed, and others fail, in diversifying their economies.
- Earth
Invasive, Indeed
Some people may live lightly on the land, but the demands of the world's population as a whole consume nearly a quarter of Earth's total biological productivity.
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Stem Cells from Virgin Eggs
Making embryonic stem cells from unfertilized eggs might bypass many ethical concerns, but important scientific hurdles remain.
- Paleontology
Back from the Dead?
The long-term disappearance of creatures from the fossil record and their later reemergence can provide insights into ancient environmental conditions and the trustworthiness of the fossil record itself.
