AAAS has made a $10,000 donation to the AAAS Caribbean Division to help the Puerto Rican scientific enterprise rebuild in the wake Hurricane Maria.

A new study using mouse tumors and human lung cancer cells helps explain why taking antioxidants could accelerate the growth of early tumors or precancerous lesions in high-risk populations.

The link between the XMRV retrovirus and patients with chronic fatigue syndrome is probably the result of laboratory contamination, according to two new studies published today by the journal Science.

In 2009, a report that patients with chronic fatigue syndrome were infected with XMRV attracted considerable interest, but subsequent studies published in other journals by independent scientists failed to detect XMRV in other groups of patients with the condition. (Vincent Lombardi et al, Science Express 8 October 2009; Science 23 October 2009)

Until this year, all human-made objects have moved according to the laws of classical mechanics. Back in March, however, a group of researchers designed a gadget that moves in ways that can only be described by quantum mechanics—the set of rules that governs the behavior of tiny things like molecules, atoms, and subatomic particles. In recognition of the conceptual ground this experiment breaks, the ingenuity behind it, and its many potential applications, Science has called this discovery the most significant scientific advance of 2010.

Until this year, all human-made objects have moved according to the laws of classical mechanics. Back in March, however, a group of researchers designed a gadget that moves in ways that can only be described by quantum mechanics—the set of rules that governs the behavior of tiny things like molecules, atoms, and subatomic particles. In recognition of the conceptual ground this experiment breaks, the ingenuity behind it, and its many potential applications, Science has called this discovery the most significant scientific advance of 2010.

AAAS today expressed strong concerns that a legal ruling blocking federally funded human embryonic stem cell research will badly delay medical progress that could someday save lives and treat devastating injuries and illness.

The uncertainty created by the 23 August ruling of U.S. District Judge Royce C. Lamberth “is bound to be tremendously disruptive to researchers endeavoring to advance human embryonic stem cell research to improve human quality of life,” said Albert Teich, director of Science and Policy Programs at AAAS.