system
Given the following post, respond as if you're commenting on Reddit:
human
Do all flying insects share one common flying ancestor, or did flight evolve multiple times in the different insect families?
gpt
> Insects were the first group of organisms to take wing and their flight appears to have evolved only once.

Wheat and Wahlberg. 2013. Phylogenomic Insights into the Cambrian Explosion, the Colonization of Land and the
Evolution of Flight in Arthropoda. *Systematic Biology* 62(1): 93 - 109.