Nasa has fixed a crucial power supply problem on the International Space Station with a toothbrush.
The space agency had previously said it was "at a loss" on how to fix the issue. which involved a stuck bolt encountered when installing a new power unit - on the outside of the station.
A spacewalk to install the 230-pound unit on 30 August lasted more than eight hours, but ended in failure.
So when Nasa astronaut Sunita Williams and Japanese astronaut Akihiko Hoshide returned to the vacuum of space for another go on Wednesday, they needed a new idea - and some new tools, including a toothbrush.
The modified brush was used to lubricate the inside of the sticky bolt's housing, after removing metal shavings and other debris.
Another cleaning tool made from wires was also used too clean the bolt's housing.
"It was really amazing to watch the ingenuity, to watch the flight controllers," said flight director Ed Van Cise.. "It was amazing to see it all come together."
"We did make jokes and talk about Apollo 13. 'Failure is not an option' is certainly something I mentioned a couple times, because we had to get this installed."
The failure to install the unit had cut power on the space station by 25%, but now it's up and running and functioning normally.