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The periodic table, created in the early 1860s by Russian chemist Dmitri Mendeleev, marked one of the most extraordinary advances in modern chemistry. This basic ...
The clearest, simplest guide to maths and mathematical theory ever published
Understanding maths has never been easier.
Combining bold, elegant graphics with easy-to-understand text, Simply ...
The Winter Triangle, Southern Cross, and Alpha Centauri are just three of the endlessly spell-binding celestial patterns visible in the night sky to those based ...
