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Observations

Observations

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

Sperm cells' swimming secrets revealed

The predictable swimming sperm featured in health class videos are rather uncharacteristic portraits of the life of these sex cells.

Spermatozoa actually spend most of their time resting up in the male reproductive tract so they can make a dash to the egg once the opportunity arises...

February 4, 2010 — Katherine Harmon

Scientific American launches "World Changing Ideas" video contest

Got an idea for a better tomorrow? Enter it into our video contest. Continuing the theme of Scientific American 's December 2009 cover story, “World Changing Ideas,” which highlighted the power of science and technology to improve the world around us, we are encouraging readers to submit video entries about innovative ways to build cleaner, healthier, smarter ways of life...

February 1, 2010 — Philip Yam

Are courtrooms and toxic torts the new side of public health?

NEW YORK—The inspiring story of Erin Brockovich's legal battle with Pacific Gas and Electric Company for contaminating drinking water ended with a $333-million settlement to families in Hinkley, Calif., exposed to the company's hexavalent chromium waste, not to mention blockbuster acclaim for Brockovitch...

January 28, 2010 — Carina Storrs

Apple introduces the iPad and iBooks

What do you know? McGraw-Hill CEO Harold McGraw was on the money yesterday when he said Apple would announce a tablet on Wednesday. The iPad now has officially arrived, weighing in at less than a kilogram, with a 25-centimeter LED-backlit display that is just over a centimeter thick...

January 27, 2010 — Larry Greenemeier

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