system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How exactly does a caterpillar turn into a butterfly?
gpt
During the process of metamorphasis, all of the internal structures of the caterpillar seem to liquefy. As a result, modern imaging techniques for looking at living things without cutting them open have proven unhelpful, as all of them depend upon differences in density or tissue composition, and it all becomes pretty similar. The butterfly gets reassembled from the goop somehow.