![](http://www.alamy.com/thumbs/6/B14C6CCF-9E38-4AAC-89B7-974CD43D9688/2J50CWP.jpg)
Black man in protective coveralls mixing liquid substances in big test tube against his female colleague making another experiment
Black man in protective coveralls mixing liquid substances in big test tube against his female colleague making another experiment
Size: 8256px × 5504px
Photo credit: © Dmitriy Shironosov / Alamy / Afripics
License: Royalty Free
Model Released: Yes
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