<figure> <img src="https://cdni.rt.com/files/2018.09/article/5ba434aafc7e93a5108b45f3.png"> <figcaption>© olegmks
<strong>It turns out Russian cosmonaut Sergey Prokopyev has grayed quite a bit following the drop in air pressure on board the ISS, his colleague has discovered, while giving the commander of the Soyuz MS-09 spacecraft a haircut.
In his latest enlightening video report from aboard the International Space Station, cosmonaut Oleg Artemyev has detailed the haircut process in near-zero gravity some 400 kilometers above Earth. Using his colleague Sergey Prokopyev as his subject, Artemyev explains that while a regular hair clipper can be used in space, it must be attached to a vacuum cleaner to ensure the safety of the crew and equipment.
While cutting the hair of the commander of the Soyuz MS-09, Artemyev noticed that his friend has greyed quite a bit since arriving at the ISS in June.