Colour

Volunteers of the Azov Civil Corps light flares during rally at the Ukrainian Parliament, Friday, May 20, 2016, against holding local elections in the occupied eastern territories of Ukraine. As part of an internationally brokered peace agreement, Ukraine must hold local elections in two eastern regions controlled by Russian-backed rebels, but there are major concerns about ensuring the vote takes place in a secure and safe atmosphere. (AP Photo/Efrem Lukatsky)

Efrem Lukatsky/AP

Volunteers of the Azov Civil Corps light flares during rally at the Ukrainian Parliament against holding local elections in the occupied eastern territories of Ukraine. As part of an internationally brokered peace agreement, Ukraine must hold local elections in two eastern regions controlled by Russian-backed rebels, but there are major concerns about ensuring the vote takes place in a secure and safe atmosphere

BEIJING, CHINA - MAY 16: (CHINA OUT) Aerial view of wide area of flowers near Shisanling reservoir in Changping District on May 16, 2016 in Beijing, China. Blooming flowers attracted visitors in Beijing.  (Photo by VCG/VCG via Getty Images)

VCG/VCG/Getty

Aerial view of wide area of flowers near Shisanling reservoir in Changping District in Beijing, China

Marco Polo Flower World In Yangzhou...YANGZHOU, CHINA - APRIL 10:  (CHINA OUT) Aerial view of the flower fields in Marco Polo Flower World on April 10, 2016 in Yangzhou, Jiangsu Province of China. The Marco Polo Flower World included seven themed sessions with various kinds of flowers.  (Photo by VCG/VCG via Getty Images)

VCG/Getty

Aerial view of the flower fields in Marco Polo Flower World in Yangzhou, China. The Marco Polo Flower World included seven themed sessions with various kinds of flowers 

An airplane flies past a rainbow at dusk in Beijing...An airplane flies past a rainbow at dusk in Beijing, China, August 3, 2015. Picture taken August 3, 2015. REUTERS/Stringer CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA       TPX IMAGES OF THE DAY

Reuters

An aeroplane flies past a rainbow at dusk in Beijing, China 

A man waits to cross a road junction in Singapore August 29, 2013. REUTERS/Edgar Su

Edgar Su/Reuters

A man waits to cross a road at a junction in Singapore

Bedouin women wear traditional costumes as they sit in their tent during the Sanaa Summer Festival in Sanaa...Bedouin women wear traditional costumes as they sit in their tent during the Sanaa Summer Festival in Sanaa August 28, 2013. The two-week festival aims to stimulate domestic tourism and reassure local and international tourists about Yemen's stability.

Mohamed al-Sayaghi/Reuters

Bedouin women sit in their tent during the Sanaa Summer Festival in Sanaa. The two-week festival aims to stimulate domestic tourism and reassure local and international tourists about Yemen‘s stability 

A man cycles a bike over painted lines a...A man cycles a bike over painted lines at the trade fair centre where the Ideen Expo 2013 will take place in Hanover on August 22, 2013.  The fair, opening on August 24, 2013, is organised for children, youth and young adults to arouse their spirit of resarch and to promote careers in the business of technique and natural sciences. AFP PHOTO / DPA / JULIAN STRATENSCHULTE   GERMANY OUTJULIAN STRATENSCHULTE/AFP/Getty Images

Julian Stratenschulte/Getty

A man cycles over painted lines at the trade fair centre in Hanover, Germany where the Ideen Expo 2013 will take place. The fair, opening on Saturday, is aimed at children, youth and young adults to promote careers in the business of technique and natural sciences. 

A boy dressed as Lord Krishna, a Hindu deity, participates in a parade to mark the Gaijatra Festival, also known as the festival of cows, in Kathmandu...A boy dressed as Lord Krishna, a Hindu deity, participates in a parade to mark the Gaijatra Festival, also known as the festival of cows, in Kathmandu August 22, 2013. Hindus in Kathmandu celebrate the festival to ask for salvation and peace for their departed loved ones. Cows are regarded as holy animals in Nepal which help departed souls to reach heaven. REUTERS/Navesh Chitrakar (

Navesh Chitrakar/Reuters

A boy dressed as Lord Krishna, a Hindu deity, participates in a parade to mark the Gaijatra festival, also known as the festival of cows, in Kathmandu on Thursday. Hindus in Kathmandu celebrate the festival to ask for salvation and peace for their departed loved ones. Cows are regarded as holy animals in Nepal, which help departed souls to reach heaven 

Hindu women carry Kalash during a religious procession locally known as Ganga Kalash Yatra in Ahmedabad...Hindu women carry Kalash, earthen pots containing sacred water with a coconut on top of them, during a religious procession locally known as Ganga Kalash Yatra in the western Indian city of Ahmedabad May 22, 2013. REUTERS/Amit Dave (INDIA - Tags: SOCIETY RELIGION)

Amit Dave/Reuters

Hindu women carry Kalash, earthen pots containing sacred water with a coconut on top, during a religious procession locally known as Ganga Kalash Yatra in India’s western city of Ahmedabad on Wednesday.

A peacock spreads its colorful feathers at the zoo of Duisburg, Germany, Friday, May 3, 2013. (AP Photo/dpa, Federico Gambarini)

Federico Gambarini/AP

A peacock spreads its colourful feathers at Duisburg zoo, Germany on Friday.