General relativity and quantum mechanics are the twin foundations of modern physics, but there's a problem: they're mutually exclusive, at least according to our current understanding. A new model using loop quantum gravity might have the beginnings of a solution.
When a giant star dies, it can collapse into a black hole or implode into an ultra-dense neutron star. But there are even stranger possibilities. Here are some theorized stars that make black holes look downright boring.
For three years, speculative biology enthusiast Gert van Dijk has been writing a hard science fiction blog called Furahan Biology and Allied Matters, which deals with the realistic ecosystem on the imaginary planet Furaha. It's a treasure trove of biogeekery.