January: The Process and Nature of Science February: Evolution March: Physics and Technology April: Energy Resources May: Sustainability and the Environment June: Ocean and Water July: Astronomy August: Weather and Climate September: Biodiversity and Conservation October: Geosciences and Planet Earth November: Chemistry December: Science and Health Year of Science 2009 home page
Physics and Technology Puzzle

Ferrofluid, with permanent magnets underneath (photo courtesy of Felice Frankel, MIT) .