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

Verizon CEO: Stay online, we'll just build a faster network

LAS VEGAS—It's easy to poke fun at people so absorbed in their smart phones, tablets and other mobile technology that they're oblivious to anything outside the virtual world (stop signs, theater etiquette, live sporting events, children etc.)...

January 6, 2011 — Larry Greenemeier

Copycat catfish evade competition

In the animal kingdom it pays to look more dangerous and less tasty. It also helps if harmful species resemble one another so that predators might "learn" more easily to avoid both...

January 5, 2011 — Katherine Harmon

Did big babies help bring human ancestors down from the trees?

Relative to our ape brethren, humans give birth to really big babies. This especially substantial infant size—along with newborns' large heads and general helplessness—helped to spur the development of more advanced social systems to help mother and child safe, researchers think...

January 3, 2011 — Katherine Harmon

Alpha-carotene from veggies linked to longer life

Need another reason to eat your greens (and yellows and oranges) as part of a healthful diet in the New Year? A large U.S. study has found that adults with higher concentrations of serum alpha-carotene in their blood were likely to live longer than those who had lower levels...

December 30, 2010 — Katherine Harmon

Fossilized food stuck in Neandertal teeth indicates plant-rich diet

Ancient humans' lax dental hygiene has been a boon for researchers looking for clues about early diets. Traces of fossilized foodstuffs wedged between Neandertal teeth have revealed plentiful traces of grains and other plants, supporting the theory that these heavy-browed humans were not just meat-eaters...

December 27, 2010 — Katherine Harmon

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