Eugène Charles Catalan made his famous conjecture – that 8 and 9 are the only two consecutive perfect powers of natural numbers – in 1844 in a letter to the editor of Crelle’s mathematical journal. One hundred and fifty-eight years later, Preda Mihailescu proved it.
Amateur astronomers – particularly deep-sky observers – are always on the lookout for new observing challenges. The Herschel Objects, and How to Observe Them offers the exciting opportunity of retracing the steps of the greatest visual observer and celestial explorer that ever lived. This is a practical guide to seeing the most impressive of Herschel’s star clusters, nebulae and galaxies.
Promoting Positive Development in Early Childhood: Building Blocks for a Successful Start
The formative years – ages three through five – are critical to building a solid foundation for children’s long-term success. And although the relationship between children and parents is central to healthy development, a variety of community members and institutions – schools, programs, neighborhoods – often make important and lasting contributions.
Includes 6 discs and users guide. Level I: Transcendence Level II: Lucid echoes Level III: Infinity Level IV Crystal rain Level V: Neptune's cave Level VI: Fusion A breakthrough “brain entrainment” system – that you can operate at home with nothing more than your CD player – “programs” your brain to think better, faster, and more creatively – based on proven neuro-science principles....
Added by: trung1906 | Karma: 22.56 | Other exams, Audio | 3 July 2010
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The Princeton Review realizes that acing the TOEIC is very different from getting straight A’s in school. We don't try to teach you everything there is to know about English–only what you'll need to score higher on the exam. There's a big difference.
