Brain-on-a-chip. Dazzling in green and magenta this image shows the nerve fibres (in green) produced by neural stem cells (in magenta) as they grow on a synthetic gel. Captured by a technique known as confocal microscopy, the image is part of research shedding light on how tinkering with the environment can affect the way in which nerve fibres grow. (Photo by Collin Edington and Iris Lee/Massachusetts Institute of Technology/Wellcome Images)
Soldiers of People's Liberation Army (PLA) Lanzhou Military Region jump through a burning obstacle during a training session at a military base in Tianshui, Gansu province, China, January 6, 2016. (Photo by Reuters/Stringer)
The Eiffel Tour-the body language of balance. I came across this group of young adults from Sarajevo, Bosnia, having fun testing their balance two nights ago in on the Esplanade de Trocadero. (Photo and comment by Peter Turnley)
A man walks past graffiti depicting the missing Malaysia Airlines flight MH370 on the one year anniversary of its disappearance in Kuala Lumpur, March 8, 2015. Prime Minister Najib Razak said on Sunday Malaysia remains committed to the search for the missing MH370 jetliner a year after it vanished without trace and he is hopeful it will be found. REUTERS/Olivia Harris (MALAYSIA - Tags: TRANSPORT DISASTER ANNIVERSARY)
British singer and actress Rita Ora performs on the stage at Sporting Summer Festival in Monaco on Tuesday, August 7, 2018. (Photo by Andrew Timms/Rita Ora Instagram)