Photographer Gregg Segal travelled the world to document children and the food they eat in a week. Partly inspired by the increasing problems of childhood obesity, he tracked traditional regional diets as yet unaffected by globalisation, and ironically, found that the healthiest diets were often eaten by the least well off. (Photo by Gregg Segal/The Guardian)

Dancers perform during the opening ceremony before the Russia 2018 World Cup Group A football match between Russia and Saudi Arabia at the Luzhniki Stadium in Moscow on June 14, 2018. (Photo by Sergei Bobylev/TASS via Getty Images)

Models, painted by bodypainting artist Alex Hansen from Brasil and Benoit Botella from Guadaloupe, pose for a picture at the 21st World Bodypainting Festival 2018 on July 14, 2018 in Klagenfurt, Austria. (Photo by Didier Messens/Getty Images)

Though schools around the globe have different start dates, calendars and traditions, the first day of a new term is an exciting time filled with the prospects of gaining more knowledge, making new friends and building community. Here: Schoolchildren attend their first lesson on Knowledge Day in the town of Turov, Zhytkavichy District, Gomel Region, Belarus on September 1, 2017. Knowledge Day marks the beginning of a new school year in Belarus and is celebrated on September 1. (Photo by Viktor Drachev/TASS via Getty Images)

Family Donation by Si Thu Ye Myint (Myanmar, Winner). Myin Twin village in upper Myanmar. (Photo by Si Thu Ye Myint/Sony World Photography)

“Nachos are a popular corn based food of Mexican origin associated with Tex-Mex cuisine that can be either made quickly to serve as a snack or prepared with more ingredients to make a full meal. In their simplest form, nachos are tortilla chips or totopos covered in melted cheese and salsa. First created circa 1943 by Ignacio "Nacho" Anaya, the original nachos consisted of fried corn tortillas covered with melted cheddar cheese and pickled jalapeño peppers”. – Wikipedia

Photo: Workers put the finishing touches on the nachos as Ninety Nine Restaurants in Billerica, Massachusetts set a new world record by creating the Guinness World Records World's Largest Nachos, weighing in at 3,999 lbs on October 1, 2011 in Billerica, Massachusetts. (Photo by Gail Oskin/Getty Images for Ninety Nine Restaurants)

A demonstrator is detained during May Day rallies in Santiago May 1, 2013. (Photo by Ivan Alvarado/Reuters)