What planet is most like Earth? Reseachers have identified several exoplanets similar to our planet, but none that are an ...

Mars has never looked more like a planet built for hiding secrets. A cluster of eight vast, water-carved caves appears almost engineered to shield fragile chemistry, or even biology, from the brutal ...

In a great year for premium TV, the standout theme was the re-emergence of the science fiction genre with shows that were ...