impacts

Every major advancement in science bring with it equally or greater effects in society. Electricity, automobiles, the radio, nuclear physics, the internet, genetic engineering, stem cells. Each one changed how we live in definite, observable ways. So many of these psychics, paranormalists &...

Here's a morbid query: I'm working on a sci-fi RPG setting where Earth is struck by an moderately sized asteroid. Not an "Dinosaur Killer," but one that causes a massive disruption of human civilization; economic collapse, war, famine, etc. Can anyone suggest how big such an asteroid should be...

If an asteroid is ever discovered does anyone think that it could be blown up with antimatter? There's a lot of concern about near earth asteroids. Please reply.