![a moonlit moonwalk](https://utterbuzz.com/wp-content/uploads/2024/05/a-moonlit-moonwalk-640x480.jpg)
NASA astronaut Kate Rubins places a sample marker in the soil before collecting a sample during a nighttime simulated moonwalk in the San Francisco Volcanic Field in Northern Arizona on May 16, 2024. A sample marker provides a photographic reference point for science samples collected on the lunar surface.