“I highly recommend the YouTube series Journey to the Microcosmos”
Diatoms produce a quarter to half of Earth's oxygen, shown in video
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For anyone interested in learning about phytoplankton and other microorganisms, I highly recommend the YouTube series Journey to the Microcosmos , link For example this video about diatoms, which are responsible for a quarter to half of the oxygen produced on earth, this video link Seeing high-quality video of things moving around gives a much more visceral impression than just reading text interspersed with static images, in my opinion.