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19 September, 14:17

What animals such as jellyfish or worms may be preserved as carbonaceous films in black shales.?

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  1. 19 September, 15:12
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    Elephantiasis is a common condition caused by roundworms; peoples' feet and legs swell up from roundworms blocking the flow of lymphatics. Roundworms can shed their skin and move in soil by a push-and-pull movement of their muscles. They have a digestive system and very primitive excretory and nervous systems.
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