This 23 June 2017 video about rangeomorphs is called Gone! Why Ancient Fractal Creatures Vanished.
From the University of Cambridge in England:
Big, shape-shifting animals from the dawn of time
July 10, 2017
Summary: Major changes in the chemical composition of the world’s oceans enabled the first large organisms — possibly some of the earliest animals — to exist and thrive more than half a billion years ago, marking the point when conditions on Earth changed and animals began to take over the world.
Why did life on Earth change from small to large when it did? Researchers from the University of Cambridge and the Tokyo Institute of Technology have determined how some of the first large organisms, known as rangeomorphs, were able to grow up to two metres in height, by changing their body size and shape as they extracted nutrients from their surrounding environment.
The results, reported in…
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