Italy's first female astronaut, Samantha Cristoforetti, has offered the internet a full talkthrough on one of the International Space Station's most famous and terrifying facilities: its lavatory.
Headlined the "International Space Station toilet tour", Cristoforetti's video explains how a fan creates suction to avoid smells and floating waste.
The – ahem – more solid waste astronauts produce is stored and put in cargo ferries which will burn up when the spacecraft leaves the Space Station. The astronauts' urine is recycled into drinking water.
Describing comfortable seating as unnecessary when weightless, Cristoforetti explains how most of those onboard enjoy shooting directly into the opening of the lavatory.
There is a courtesy rota when exchanging the plastic bags used to contain their turds, and a healthy attitude to communal hygiene.
Along with US astronaut Terry Virts and Russian flight commander Anton Shkaplerov, Samantha Cristoforetti is leaving the ISS today and will be landing in Kazakhstan shortly, following the successful completion of the five-month mission. ®