nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqg3up5gsrmfxwktfzdz9s3eq3nh5hj4s95dq9t6cct8trmzx5h60sgq45xw Every twenty thousand years or so north africa goes through a humid period and turns into a marsh.