Artemis II: 'No one down here is ever going to know what the four of us went through'

The crew of Artemis II are back on solid ground and have been reunited with their families.

They've travelled further into space than any human before during their nine-day voyage to the far side of the Moon - but deep space can have an effect on the human body.

To test their strength and balance, they had to do a very specific type of test before they left on the mission and then when they got back.

BBC's Science Editor, Rebecca Morelle, went to find out more.