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Destructive plate margins are where a plate of higher density is subducted, or forced underneath, another, less dense plate.

This occurs due to convection cur...

Igneous rocks

Igneous rocks are distinguishable by the fact that they are made up of crystals, which vary in size depending o...

There are three ways of turning a statement into a question in French. They are all equally good, but are perhaps used in slightly different situations, as I will explain.

The first (and easie...

Reverse Polish Notation (or RPN) is simply a different mathematical way of laying out equations, take for example the expression:
7+ 9
The layout is <First number> <Operator> <Sec...

Blood glucose homeostasis involves maintaining the levels of blood glucose within a very narrow limit around a set point (90mg 100cm-3). This is done via hormonal regulation. On one hand, insulin which is...