[Like the Science Times page on Facebook. | Sign up for the Science Times newsletter.] But they weren’t called “marimo” until Takuya Kawakami, another botanist, found them along Lake Akan in Hokkaido, Japan, more than a century later. After purchasing her own marimo, she noticed that bubbles covered them at some times of day and not others. And during the day, a few moved to the top of her tank.

Source: New York Times August 24, 2018 09:00 UTC