The purely scientific case for Rama's Bridge

In these days when we worry about global warming, it takes great chutzpah or ignorance, or both, to proceed with a plan to induce major environmental changes, with uncertain consequences.......

The future of e-commerce

Almost 15 years after the advent of e-commerce, it is interesting to take stock of how its market leaders have progressed. All the pioneers are stepping on each other's toes. For instance, Amazon's......