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

Sakine Arat, right, and Mayrem Bulut are Kurdish mothers camping out between Turkish amry forces and the Kurdish PKK militants, in hopes of preventing clashes. "Mothers on both sides should be doing this," says Arat, 80. Peter Kenyon/NPR hide caption

itoggle caption Peter Kenyon/NPR

Kumu (sp. Parupeneus porphyreus). The Whitesaddle Goatfish has a special place in Hawaiian culture. In ancient Hawaii, the fish were used in offerings to the gods. Courtesy of Derek Yoshinori Wada hide caption

itoggle caption Courtesy of Derek Yoshinori Wada

Demonstrators in downtown Beirut, Lebanon, protest the ongoing trash crisis and government corruption Saturday. Hassan Ammar/AP hide caption

itoggle caption Hassan Ammar/AP

Supporters of pro-democracy group "Bersih" (Clean) pass a taxi decorated with Malaysian flags as they march towards Dataran Merdeka in Malaysia's capital city of Kuala Lumpur, on Saturday. The group is protesting alleged corruption at the top levels of government. Edgar Su/Reuters/Landov hide caption

itoggle caption Edgar Su/Reuters/Landov

A Thai Royal Police handout photo taken with a mobile phone showing an unidentified suspect, who police say may be linked to the Aug. 17 shrine bombing. Thai Royal Police/Handout/EPA/Landov hide caption

itoggle caption Thai Royal Police/Handout/EPA/Landov

Al-Jazeera English television journalist Mohamed Fahmy talks to his lawyer Amal Clooney before hearing the verdict at a court in Cairo, Egypt, on Saturday. Fahmy and two others were sentenced to three years in prison on terrorism-related charges. Asmaa Waguih/Reuters/Landov hide caption

itoggle caption Asmaa Waguih/Reuters/Landov