This TikToker made an ecosystem jar four years ago. When she finally saw it again, she was surprised to see what was growing—or rather, moving around—in it. In a wildly viral video with more than 40 ...

This TikToker made an ecosystem jar four years ago. When she finally saw it again, she was surprised to see what was growing—or rather, moving around—in it. What’s in the jar? In a wildly viral video ...