Earthquake survivors receive medical treatment Wednesday at a hospital in Padang Panjang in West Sumatra after a 7.6 magnitude temblor rocked western Indonesia. Tundra Laksamana/AP hide caption

itoggle caption Tundra Laksamana/AP

An aggressive encounter between two male greater prairie chickens (Tympanuchus cupido). During aggressive encounters, males leap into the air and strike their opponent with feet, wings and/or beak. Fort Pierre National Grassland, South Dakota. Gerrit Vyn/gerritvynphoto.com hide caption

itoggle caption Gerrit Vyn/gerritvynphoto.com