Waves crash over the Kulluk oil rig, which washed aground on Sitkalidak Island, Alaska. Officials say aircraft have not spotted any signs of a fuel leak from the rig, which reportedly does not contain crude oil.
PA3 Jon Klingenberg/Coast Guard
Scientists at the Large Hadron Collider announced the discovery of the Higgs boson on July 4, the long-sought building block of the universe. This image shows a computer-simulation of data from the collider.
Researchers at the U.S. Geological Survey National Wildlife Health Center in Madison, Wis., use eggs to see if the Asian strain of the H5N1 bird flu virus has entered the U.S. in this photo from 2006.
Mosquitoes like this one can carry the virus that causes dengue fever, which may become a bigger problem in some regions as biodiversity is lost.
James Gathany/CDC Public Health Image Library
Photographer Freya Najade journeys into the weird sci-fi world of Europe's agricultural production. In one cow-milking facility she visited, "two people are needed to milk twice a day 300 cows," she writes.