The Economic Times

In 1999, NASA flew Ceratopteris fern spores on STS-93 to test gravity-guided growth; they germinated normally, but their developmental polarity became random

A NASA experiment examined the growth of fern spores in a zero-gravity environment. The spores showcased continued development, yet their growth patterns became erratic, highlighting the crucial role of gravity as a guiding force for plants. This research underscores how environmental cues play a vital role in shaping plant growth, relying on subtle signals even when basic survival needs are satisfied.