The first clip shows a tardigrade on its first day in OUCM-1, moving normally. Two days later, however, the simulant began to impact the tardigrade’s ability to move normally, as seen in the second clip. The other simulant, MGS-1, inhibited activity much earlier — until it was washed with water. Then, as seen in the third clip, it barely impacted tardigrade activity at all. The non-tardigrade bits visible in the second and third clips are simulant particles.
Credit: Provided by Corien Bakermans/Penn State