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Aboriginal science tools: the morah stone

This is an article about morah stones, incised grinding stones from the tropical rainforests of northern Queensland, and how they were used by the local Aboriginal peoples to process toxic starchy seeds and kernels. Written by Kudjala/Kalkadoon Elder from Queensland Letitia Murgha and intended mainly for teachers, it describes ...

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BTN: What is an abacus?

An abacus is a tool that helps people solve maths problems. Why might some people still use, and encourage the use of, an abacus when there are more contemporary tools like calculators?