This algae, called Chaetoceros atlanticus, can bloom in the ocean when iron is added to the water. It captures carbon dioxide from the atmosphere and carries the carbon down underwater when it sinks. Marina Montresor, SZN/Alfred Wegener Institute hide caption

itoggle caption Marina Montresor, SZN/Alfred Wegener Institute

Coral polyps feed in the plankton-rich waters by Santa Catalina, Panama. A new study of coral reefs off the Pacific coast of Panama shows that dead coral reefs may be able to recover from rising ocean temperatures and other environmental disasters. laszlo-photo/Flickr hide caption

itoggle caption laszlo-photo/Flickr

This image, from a sensor at the particle accelerator at CERN, is an example of the data signature a Higgs particle might generate. CERN hide caption

itoggle caption CERN

Trainees with Royal Dutch Shell learn to deploy oil spill booms in the waters near the port of Valdez in Alaska. The company is training about 200 spill responders. Richard Harris/NPR hide caption

itoggle caption Richard Harris/NPR

U.N. General Assembly President Nassir Abdulaziz Al-Nasser, United Nations Secretary General Ban Ki-Moon, Brazilian President Dilma Rousseff, Brazil's Secretary of the Conference Luis Figueiredo Machado and Rio+20 Secretary General Sha Zukang attend the closing ceremony of the Conference on Sustainable Development in Rio de Janeiro on Friday. Andre Penner/AP hide caption

itoggle caption Andre Penner/AP

Shell says it hopes to never need to use its new 300-foot-long, $100 million oil recovery ship named Nanuq for anything other than drills and training. Richard Harris/NPR hide caption

itoggle caption Richard Harris/NPR

United Nations Secretary-General Ban Ki-moon speaks during a news conference on June 7 at the United Nations headquarters in New York City. Ban wants to focus on making energy available to the poorest populations of the world. Andrew Burton/Getty Images hide caption

itoggle caption Andrew Burton/Getty Images

When a raindrop hits a mosquito, the mosquito and drop join together, and the mosquito rides the drop for about a thousandth of a second before its wings, which act like kites, pull it out of the water. CDC Public Health Image Library hide caption

itoggle caption CDC Public Health Image Library

A Tokyo sushi restaurant displays blocks of fat meat tuna cut out from a 269kg bluefin tuna. Yoshikazu Tsuno/AFP/Getty Images hide caption

itoggle caption Yoshikazu Tsuno/AFP/Getty Images

Researcher Hans Roy opens a core sample taken from the bottom of the Pacific Ocean. A core sample like this one contained bacteria that settled on the seafloor 86 million years ago. Bo Barker Jorgensen/Science/AAAS hide caption

itoggle caption Bo Barker Jorgensen/Science/AAAS