The Observer's 20 photographs of the week

Shanghai-based artist Maleonn has travelled around 25 Chinese provinces, photographing 200,000 people in a mobile photo studio.
Feast your eyes on more photographs and read more about the project by visiting the gallery Photograph: Maleonn

A flagger is chased by a bull during a traditional "corraleja" (bullfight) in Arjona, Bolivar, Colombia. Two men were killed and at least 15 injured at the event in which people are allowed to run inside the bullring Photograph: Joaquin Sarmiento/Reuters

Women in traditional mantilla dresses smoke outside church before taking part in the Brotherhood procession of "Los Estudiantes" (The Students) at the start of Holy Week in Oviedo, northern Spain Photograph: Eloy Alonso/Reuters

The landing and anti-landing drills of the Korean People's Army at an undisclosed location on North Korea's east coast. This image was distributed by the official Korean Central News Agency on 26 March and was subsequently found to be manipulated. Several hovercraft appear to have been digitally added to the original, presumably to make the military look more impressive. Read Justin McCurry's article on how the image was doctored Photograph: AFP/Getty Images

A Hindu devotee, face smeared with coloured powder, leaves the Banke Bihari temple during Holi celebrations in Vrindavan, India Photograph: Altaf Qadri/AP

A man holds up an extremely rare and complete sub-fossilised elephant bird egg at Christie's auction house in London. The egg which is more than 100 times llarger than an average chicken egg is native to Madagascar and the bird that laid it was largest bird ever to have lived. Resembling a heavily built ostrich it grew to more than three meters high Photograph: Andy Rain/EPA

Modelling the MGPIN Collection during China fashion week in Beijing Photograph: Ed Jones/AFP/Getty Images

Street performers in Rome Photograph: Andreas Solaro/AFP/Getty Images

Brazilian brides pose for photos before their mass wedding ceremony at the Museum of the Republic in Brasilia Photograph: Ueslei Marcelino/Reuters

Ultra-Orthodox Jews burn leavened items in final preparation for the Passover holiday in Bnei Brak, near Tel Aviv Photograph: Oded Balilty/AP

Tom Baker, Peter Davison and Paul McGann with the Royal Mail's special Doctor Who stamps which went on sale this week. The stamps mark the 50th anniversary of the BBC's sci-fi series Photograph: Guy Levy/Royal Mail/PA

Farmer Donald O'Reilly, with three sheep rescued from a snow drift, searches for more in Co Antrim, Northern Ireland Photograph: Cathal Mcnaughton/Reuters

Pakistani schoolchildren attend their daily classes in a makeshift school on the outskirts of Islamabad Photograph: Muhammed Muheisen/AP

Egyptian anti-government protesters pick their way through a dust storm en route to a demonstration outside the Muslim Brotherhood HQ in Cairo's Mokattam district Photograph: Gary Calton/Observer

Penitents of "San Esteban" brotherhood embrace next to a church during Holy Week in the Andalusian capital of Seville Photograph: Marcelo del Pozo/Reuters

Girls competing in the World Irish Dancing Championships wait for their spray tans to dry in Boston, Massachusetts Photograph: Jessica Rinaldi/Reuters

The shadow of a Bahraini protester is seen over graffiti which reads in Arabic 'steadfast' during clashes with riot police after the funeral of a man who died, say relatives, after inhaling poisonous tear gas at an earlier demonstration Photograph: Mohammed Al-Shaikh/AFP/Getty Images

A homeless man sits covered in snow early in the morning in Washington DC Photograph: Karen Bleier/AFP/Getty Images

A boy poses with Predator, Alien and Darth Vader during the Canaan fair, part of the Holy Week events in Ayacucho, Peru Photograph: Rodrigo Abd/AP

Children watch from the rear window of a car in Sanaa as marchers go past demanding Yemen's former president Ali Abdullah Saleh be stripped of his immunity and stand trial for the killings of protesters Photograph: Khaled Abdullah/Reuters