https://www.youtube.com/watch?v=eEDHikg9DsIA fraction of a cubic millimeter of magic water with bits scraped from Autumn leaves contains several different living systems. Large ciliates (well only relatively large of course), mysterious creatures at the edge of microscopic visibility, and cities of bacteria.
If you want to reply, then
register here. Registration is free and your account is created instantly, so you can post right away.