Down go the dams
Article Abstract:
Many dams around the world are being decommissioned so that rivers and streams can recover, but ecologists are learning that removing dams takes a great deal of careful planning and active intervention because sometimes the dams provide environmental benefits, such as holding back toxic sediments or blocking the progress of invasive species. Several strategies are discussed that might prove to be the key to success of future dam removal projects.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2007
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Freud returns
Article Abstract:
The explanations on the working of human mind were dominated by the ideas of Sigmund Freud in the first half of the 1900s. Scientific investigations show that major aspects of Freud's thinking are erroneous.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2004
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Political Science
Article Abstract:
A comparison is made between presidential candidates John Kerry and George W. Bush on topics such as embryonic stem cell research, national missile defense, science policy, climate change and AIDS.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2004
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