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...introduction to how ruminants break down the plant matter they eat - equally useful as a quick revision aid on ruminants...Find out more about The Open University's Biology qualifications. What is a ruminant? The word 'ruminant' is derived from the Latin word ruminare, to chew again. Ruminants are animals with four-part stomachs, which allows them to chew food more than...

...introduction to systems maps, why you might use them and discover how to draw them with our diagram tutorial...What are systems maps? How to draw systems maps Diagram guidelines Purpose A systems map shows components of the system and environment from the perspective of the person drawing the map. It is possible to depict a different perspective of the same situation by...

...projection) map it’s obvious at the poles. Now we can expand our definition and say objects not influenced by a force travel along straight lines in curved space. In particular, things with mass (or energy, thanks to E = mc²) follow these straight paths in curved space. The experimental proof of this occurred during a solar eclipse in 1919 where starlight was observed...