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Opinion, arguments & analyses from guest experts and from the editors of Scientific American

How Hackers Take Down Web Sites [Video]

Many of the Web sites we visit every day are under cyber attack by malicious hackers looking to disrupt business transactions, discourage people from using a particular online service or exact payback for some real or perceived slight...

October 21, 2016 — Larry Greenemeier

Will Elon Musk Scuttle the Search for Life on Mars?

If there is life on the Red Planet—even just alien microbes clinging to existence in isolated refuges—any biological contamination we import from Earth could cause an ecological and scientific catastrophe...

October 9, 2016 — Lee Billings

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