Key keywords: NASA astronaut, International Space Station, egg-shaped space object, tentacle-like growth, zero-gravity biology experiment, ISS microbial research, slime mold space study, space viral content Last week, NASA Expedition 70 astronaut Jasmin Moghbeli sent social media into a frenzy after she shared a surreal photo taken aboard the International Space Station (ISS) showing a pale, egg-shaped structure sprouting wispy, translucent tentacle-like protrusions across its surface. The post racked up over 12 million views on X (formerly Twitter) in 48 hours, with thousands of users initially speculating the object was evidence of extraterrestrial life or a prop straight out of a science fiction horror franchise. NASA quickly clarified the bizarre object is part of the European Space Agency’s (ESA) ongoing “Slime in Space” research project, which studies the behavior of Physarum polycephalum, commonly known as slime mold, in microgravitational environments. The egg-shaped base is a nutrient-rich agar substrate designed to feed the single-celled organism, while the tentacle-like growths are its pseudopodia, or temporary appendages the slime mold uses to explore its surroundings, seek out additional food sources, and navigate obstacles. Slime molds have long fascinated biologists for their unusual cognitive abilities despite lacking a brain, nervous system, or traditional sensory organs. On Earth, studies have shown the organism can solve complex mazes, remember patterns, and make trade-off decisions about resource use, even with no centralized processing structure. The ISS experiment aims to identify how zero gravity alters these traits, as gravitational pull is known to guide the direction of pseudopodia growth in ground-based trials. Initial observations shared by Moghbeli note the space-grown slime mold is producing pseudopodia in all 360-degree directions, rather than the mostly downward-facing growth seen in Earth control groups, and is growing approximately 12% faster than its terrestrial counterparts. ESA lead researcher Dr. Audrey Dussutour, a leading slime mold expert, explained the findings could unlock new insights into primitive life adaptation, and even inform the design of biological sensors for future deep space missions, as the resilient organism could be used to monitor air and surface quality in lunar or Martian habitats with minimal maintenance. NASA confirmed the experiment is fully contained and poses no risk to ISS crew or systems, and the sample will be chemically fixed and sealed for return to Earth on a future Crew Dragon mission for full genomic and structural analysis. The viral photo has also sparked a surge in public interest in low-profile ISS biology research, with dozens of K-12 schools across the U.S. and EU adding slime mold experiment guides to their STEM curricula following the post’s circulation.