Ahmed (20) son of Ahmadou, from the small Nemadi (hunters) tribe in Eastern Mauritania, prepares his turban in Mauritania. AFP / JOHN WESSELS

Displaced Syrian girls look on from within a vehicle passing through the town of Hazano in the northern countryside of Idlib fleeing northwards amid an ongoing regime offensive. AFP / AAREF WATAD

Visitors look at jellyfish swimming in a giant spherical tank at the World of Jellyfish aquarium in Prague, Czech Republic. REUTERS/David W Cerny

A migrant holds a child during clashes with riot police as refugees and migrants demonstrate outside the Kara Tepe camp, on the island of Lesbos. AFP / Manolis Lagoutaris

A dog wears a paper cup over its mouth on a street in Beijing. AFP / GREG BAKER

Katelyn Yang from the United States performs on stage during the first day of the 48th Prix de Lausanne at the 2m2c Montreux Music & Convention Centre, in Montreux, Switzerland. (Laurent Gillieron/Keystone via AP)

Venezuelan army soldiers and militia leave after a rally at the "23 de Enero" neighborhood of Caracas to commemorate of the coup led by late president Hugo Chavez 28 years ago. AFP / Yuri CORTEZ