The flooding of the Nile provided fertile land
Going skinny dipping, lol you didn’t give any options
This is a fun one. The Roman Republic developed many inventions that helped better society. The roads for trade were huge that helped them get all the needs. Believe it or not, there was public health programs for better living. The legal system helped them from right and wrong.
They dropped alligator carcasses on the bottom of the ocean floor as an experiment on a better understanding of the underwater food system! :) and this happened in 2020 Jan 11th