How fast does gravity travel? When will the sun go nova? Who invented the light year? Will we ever travel to the stars? These are just some of the unusual and popular questions NASA astronomer Sten Odenwald answers in Back to the Astronomy Caf, based on his award-winning website "for the astronomically disadvantaged. " Since his acclaimed earlier book The Astronomy Caf publis...(展开全部)

How fast does gravity travel? When will the sun go nova? Who invented the light year? Will we ever travel to the stars? These are just some of the unusual and popular questions NASA astronomer Sten Odenwald answers in Back to the Astronomy Caf, based on his award-winning website "for the astronomically disadvantaged. " Since his acclaimed earlier book The Astronomy Caf publis...(展开全部)

President Bill Clinton gives us his views on the challenges facing the United States today and why government matters—presenting his ideas on restoring economic growth, job creation, financial responsibility, resolving the mortgage crisis, and pursuing a strategy to get us "back in the future business.” He explains how we got into the current economic crisis, and offers specifi...(展开全部)

President Bill Clinton gives us his views on the challenges facing the United States today and why government matters—presenting his ideas on restoring economic growth, job creation, financial responsibility, resolving the mortgage crisis, and pursuing a strategy to get us "back in the future business.” He explains how we got into the current economic crisis, and offers specifi...(展开全部)

If you could bring back just one animal from the past, what would you choose? It can be anyone or anything from history, from the King of the Dinosaurs, T. rex, to the King of Rock 'n' Roll, Elvis Presley, and beyond. De-extinction - the ability to bring extinct species back to life - is fast becoming reality. Around the globe, scientists are trying to de-extinct all manner of ...(展开全部)

These notes arise from lectures presented in Florence under the auspices of the Accadamia dei Lincee and deal with an area that lies at the crossroads of mathematics and physics. The material presented here rests primarily on the pioneering work of Vaughan Jones and Edward Witten relating polynomial invariants of knots to a topological quantum field theory in 2+1 dimensions. Pr...(展开全部)

These notes arise from lectures presented in Florence under the auspices of the Accadamia dei Lincee and deal with an area that lies at the crossroads of mathematics and physics. The material presented here rests primarily on the pioneering work of Vaughan Jones and Edward Witten relating polynomial invariants of knots to a topological quantum field theory in 2+1 dimensions. Pr...(展开全部)

Twenty years after the Agile Manifesto was first presented, the legendary Robert C. Martin (“Uncle Bob”) reintroduces agile values and principles for a new generation of software developers. In this eagerly-awaited book, the best-selling author of The Clean Coder shows how to bring unprecedented levels of professionalism and discipline to agile development — and thereby write f...(展开全部)

Twenty years after the Agile Manifesto was first presented, the legendary Robert C. Martin (“Uncle Bob”) reintroduces agile values and principles for a new generation of software developers. In this eagerly-awaited book, the best-selling author of The Clean Coder shows how to bring unprecedented levels of professionalism and discipline to agile development — and thereby write f...(展开全部)