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
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.
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.
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
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
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