Researchers made a porphyrin-like ring that can do something its paper analogue can't: the new molecule can switch back and forth between the one-sided Möbius topology and a "normal" two-sided state (Hückel topology) -- without breaking the ring.

A preliminary study of 85 patients with bipolar disorder shows that a drug used to treat patients with sleep disorders might also control the depressive symptoms associated with bipolar disorder. At least 44 percent of the participants in the study reported improved symptoms, a noteworthy improvement for a disorder in which new treatments are needed.

An experimental gas turbine simulator equipped with an ultralow-emissions combustion technology called LSI has been tested successfully using pure hydrogen as a fuel -- a milestone that indicates a potential to help eliminate millions of tons of carbon dioxide and thousands of tons of NOx from power plants each year.

When using gestures to get their points across, orangutans rely on the same basic strategy that humans follow when playing the popular game and intentionally modify or repeat hand (or other) signals based on the success or failure of their first attempt.