The cichlid, a small fish, has one of the most incredible visual systems known—which allows it to adapt to differently colored environments. Jason G. Goldman reports.

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When LSD binds to serotonin receptors, it pulls a "lid" closed behind it, locking it in place for hours, and explaining its long-lasting effects. Christopher Intagliata reports. 

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Sunscreen or beach umbrellas alone were unable to completely prevent sunburns—so researchers suggest combining the methods instead. Christopher Intagliata reports.

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The six-legged savants appear to use celestial cues and three forms of memory, as they blaze a trail back to the nest. Karen Hopkin reports.

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A study examines the effects of a high-sugar diet on the life spans of fruit flies. Another studies how the flies’ appetite-suppressing pathways may be similar to ours. Karen Hopkin reports. 

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A common pesticide additive, known as an "inert" ingredient, could be one of the causes of the die-offs beekeepers have observed in their hives. Christopher Intagliata reports.

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Scientific American executive editor Fred Guterl talks with Pres. Obama’s science advisor, John Holdren, about climate science, space travel, the issue of reproducibility in science, the brain initiative and more.

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Chemists have synthesized the most complex molecular knot ever, using a strand just 192 atoms long. The advance could lead to new tougher materials. Christopher Intagliata reports.

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Pulitzer Prize–winning N.Y.U. historian David Oshinsky, director of the Division of Medical Humanities at the N.Y.U. Langone Medical Center, talks about his latest book, Bellevue: Three Centuries of Medicine and Mayhem at America’s Most Storied Hospital.

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Using algorithms developed for human speech recognition, researchers decoded which bats in an experimental colony were arguing with each other, and what they were arguing about. Christopher Intagliata reports.

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