It was a warm Northern Hemisphere spring, overall, according to the State of the Climate Global Analysis from NOAA and the National Climatic Data Center of May 2012.
An experiment that examined hotel room surfaces found TV remotes to be among the most heavily contaminated with bacteria so are the nastiest surfaces in the room.
Officials preparing for Rio+20 have identified seven critical issues to ensuring global sustainability: jobs, energy, cities, food, water, oceans and disaster readiness.
North America and most of Europe could see a global fire risk by century's end. But fire activity could decrease around equator, because of increased rainfall.
Scientists have used genetically-engineered mosquitoes whose immune systems kill the malaria parasite. These mosquitoes can't transmit malaria with their bites.