Changing winter conditions are causing Scotland's wild Soay sheep to get smaller despite the evolutionary benefits of having a large body, researchers report in the new issue of Science.

NASA's Phoenix mission landed on the planet Mars in May 2008, and explored the surface of the Red Planet for more than five months. New data from the Phoenix Mars Lander confirms that there is a layer of ice water at the Martian north pole—about five to 18 centimeters beneath the soil.

Ahh, summer. Warm breezes, cool ice cream, the gentle whine of mosquitoes. And the not-so-gentle whine of bored children. For them, AAAS offers a reading list of 10 good science books.

High school science teachers value control over their lesson plans and prestige in their school districts more than salary increases, according to a survey discussed at AAAS.

A London meeting hosted by the Royal Society and co-sponsored by AAAS brought S&T leaders from around the world to discuss the promise and challenges of science diplomacy.

On its 37th anniversary, the anti-discrimination law's effect on educating women for science, technology, engineering and math careers has been profound but remains incomplete, experts say.

After earning tenure, some faculty members excel, others "meander," and a few "become deadwood." Science Careers offers tips for mid-career scientists hoping to stay enthusiastic.

Announcements about major steps in stem cell research are now fairly common. A special section in this week's issue of Science looks at the path toward the clinic that stretches ahead.

In environments with high carbon dioxide levels, researchers say that the ear bones of young fish actually grow larger than normal—rather than smaller, as they had expected. This finding means that ocean chemistry could have unexpected effects on the minerals produced by fish larvae.

Woody Savage and Lyn Armbruster, former students of high school physics teacher John Marean, honor his influence with generous support for the AAAS Leadership in Science Education Prize.

Despite much hope—and hype—on progress toward cutting-edge tailored therapies, researchers said at AAAS that personalized medicine is proving more complex than expected.

A molecule seems to counteract anxiety and panic attacks in both mice and humans without the negative side effects associated with current remedies, researchers say in Science.

Plant fossils from Greenland tell us that the number of plants there decreased abruptly about 200 million years ago, when the Triassic period ended and the Jurassic period began, researchers say in the latest issue of Science.

Educators from the world's second largest city visited AAAS to learn about Project 2061 and share their efforts to develop science curricula and promote science literacy in China.

For the first time, ecologists publishing decades of research that helped rescue the large blue butterfly in the U.K. The research, released today, appears 18 June at Science Express.

Speaking at a AAAS-organized conference, a legal expert shared strategies that colleges and universities can employ to boost diversity among students and faculty.

Is it the worst of times for newspapers? Five science journalists discussed what will replace traditional news outlets and how consumers will know what sources to trust.

For towns near the Amazon rainforest in Brazil, deforestation generally increases prosperity at first, but then yields a decline, researchers say in the latest issue of Science.

Plants and flying animals have evolved the same aerodynamic trick for fighting gravity while flying, scientists have discovered.

Despite efforts by the U.S. federal government to reduce visa delays for international scientists, AAAS and other science and higher education organizations say more can be done.

In a Houston Chronicle commentary, AAAS urges Texas, Alaska, Missouri, and South Carolina to join the push for nationwide education standards, which should include science, too.

A new coalition of professional associations and unions seeks to help organizations and their members defend against external pressures that challenge the integrity of their work.

How to influence and win support from members of Congress? Be brief, jargon-free and develop on-going relationships, policy-makers told scientists during a AAAS briefing.

At the first annual Hitachi Lectureship at AAAS, two brain researchers described treatments that allow communication with paralyzed persons and easing age-related brain disorders.

Population growth, migration, and other demographic changes among our hunter-gatherer ancestors may have played a major role in the evolution of modern human social behavior.

When a cuckoo comes along, hoping to sneak one of its own eggs into a reed warbler nest, the warblers mount an impassioned defense, mobbing the parasitic birds while making loud, raspy calls and snapping their beaks.

Economy got you down? AAAS/Science Careers has a collection of online resources and outreach events to help you become a more competitive applicant and land that next job.