24 hours in pictures

Hohenzell, Austria: a breeding bull stands under infrared lights, used to relax his muscles, at an artificial insemination centre Photograph: Leonhard Foeger/Reuters

Niteroi, Brazil: a woman paints masks representing Pope Francis in a factory Photograph: Christophe Simon/AFP/Getty Images

Boston, Massachusetts, USA: investigators search for evidence on the rooftops of buildings located above the sites of the twin Boston marathon bomb blasts on Boylston Street Photograph: Adrees Latif/Reuters

Parma, Italy: a man spins dough during the freestyle event of the Pizza World Championships Photograph: Marco Vasini/AP

Guadalajara, Mexico: a contestant in a beauty pageant for older women sits on stage Photograph: Alejandro Acosta/Reuters

West, Texas, USA: plate glass windows lie shattered after an explosion at the West Fertiliser Company Photograph: Chip Somodevilla/Getty Images

Jerusalem: two Palestinian children look at a large poster showing over a hundred Palestinians from Jerusalem who are currently held in Israeli jails during a demonstration calling for their release Photograph: Jim Hollander/EPA

Taiyuan, China: staff take part in a drill in the event of animal escape at a zoo Photograph: China Daily/Reuters

Beijing, China: a girl gets made up by Weta Workshop chief Sir Richard Taylor during the 3rd Beijing international film festival carnival Photograph: ChinaFotoPress via Getty Images

New Delhi, India: a woman speaks on a phone as her daughter stands beside her outside a local telephone booth Photograph: Adnan Abidi/Reuters

Tehran, Iran: members of the Iranian air force march during the Army Day parade Photograph: Behrouz Mehri/AFP/Getty Images

Mieres, Spain: a cameraman films a demonstration by miners and residents from the Asturian regions as they march through a street in support of coalmining Photograph: Eloy Alonso/Reuters

Almonte, Spain: a Pure Spanish Breed mare runs on a ranch in Andalusia. Barring an unlikely reprieve, the purebreds will be turned into horsemeat for export in the coming months, victims of the economic downturn Photograph: Laura Leon/AP

Lima, Peru: students touch a robot at the Science Tunnel exhibition at the Catholic University Photograph: Mariana Bazo/Reuters