Delegates took their seats during the plenary session at the Bonn climate change conference on March 10, 2014. Negotiations resume this week; by the end of the year, the U.N. hopes to have forged a new global agreement. UNclimatechange/Flickr hide caption

itoggle caption UNclimatechange/Flickr

Two octopuses going at it — or, as marine biologist Peter Godfrey-Smith might put it, engaging in a bit of "ornery" behavior. Peter Godfrey-Smith (CUNY and University of Sydney), David Scheel (Alaska Pacific University), Stefan Linquist (University of Guelph) and Matthew Lawrence. hide caption

itoggle caption Peter Godfrey-Smith (CUNY and University of Sydney), David Scheel (Alaska Pacific University), Stefan Linquist (University of Guelph) and Matthew Lawrence.

Inspektor Jan Gieber of Austrian police shows the inside of the large van outside the police station in Braunau, Upper Austria, on Sunday, where the children were found among 26 migrants trying to reach Europe. Daniel Scharinger/EPA/Landov hide caption

itoggle caption Daniel Scharinger/EPA/Landov

Protesters hold a sign Saturday that reads, in Portuguese, "Don't kill our children," in a march against police and gang conflicts that have left residents of the Complexo de Alemao favela in the crossfire. Silvia Izquierdo/AP hide caption

itoggle caption Silvia Izquierdo/AP