A research team led by Dr. Sofia Sheikh of the SETI Institute, in collaboration with the Characterizing Atmospheric ...

If Nemesis were still present, its gravitational pull could disrupt planetary orbits, making life on Earth impossible. Luckily, no evidence of a twin companion exists today. Scientists use ...

“Any philosophy that can be put in a nutshell belongs in one,” he wrote. He is particularly famous for inventive thought experiments – one of which is about “Twin Earth”. Imagine that there is a ...