Celia Hatton

Four astronauts have arrived back on Earth after their mission at the International Space Station was cut short because of an unspecified medical issue.

Their space capsules splashed down into the waters off the coast of California.

This was the first medical evacuation that's ever been carried out since crews first started going to the station a quarter of a century ago.

The newsroom's Peter Goffin was watching the return.

Peter, I do agree with you.

Watching the images of that capsule splashing down and then waiting for it to be reopened was pretty cool.

But it must have been a difficult moment for the astronauts who've had their mission cut short.

Peter Goffin.

It's 25 years today since the launch of Wikipedia.

The online encyclopedia is funded by donations and run by volunteers, meaning it's made a huge amount of knowledge available for free.

But it's also open to abuse and misinformation.

Our technology editor Zoe Kleinman has been looking back at how one of the internet's most popular sites came to be.

Since its launch in 2001, Wikipedia has grown from a few hundred articles to more than 65 million across 300 languages.

It's become the go-to resource for curious minds worldwide and hundreds of thousands of volunteers work tirelessly to keep it up to date.

People rush to Wikipedia when someone famous dies.

Its service almost collapsed following Michael Jackson's death in 2009, and its page about the US conservative activist Charlie Kirk was visited 170 times per second in the hours after he was assassinated.

It's also gone from digital to analogue.

The Magna Carta page was turned into a giant embroidery.

Back to basics.

Founder Jimmy Wales told me why it's called Wikipedia.