Incredibly "big" save

I don't know why, but my current game have a save file 4 times bigger than the previous ones. O_o

Both Hygiea and Metis are games created since the launch update. Metis was in the standard asteroïd (saved at cycle 1848, 12 duplicants), and Hygiea in the Oceania type (saved at cycle 1932, only 7 duplicants).

Hygiea is just amazingly bigger than Metis. O_o

I don't use any mod.

Hygiea.sav