In Space, Washing Your ‘Hair’ Looks A Bit Different

In Space, Washing Your ‘Hair’ Looks A Bit Different

Luca Parmitano uses warm water to rinse his bald head. The water sticks to his scalp like that because of physics: where there is no gravity, surface tension dominates. That means the otherwise weak bonding that happens during surface tension suddenly becomes strong enough for Parmitano’s head to keep the water very close.

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