NASA astronauts prepare for 2025 moonwalk underwater

Divers are helping astronauts prepare for a mission to the Moon. They're testing special conditions in a super deep swimming pool in Texas, USA.
Nasa is aiming to send people back to the Moon as part of its Artemis mission in 2025.

Turning off all the lights helps simulate what an astronaut might experience at the Lunar South pole - long, dark shadows.

This research pool is around 12 metres deep, and allows astronauts to train in an environment that is similar to that of the surface of the Moon.

In the past, astronauts explored the area near the Moon's equator, which was lit by the light from the Sun.

However, this time round astronauts will be exploring the Moon's south pole, a dark shadowy area where scientists think that there might be water ice.