What would happen, then, should the first unquestionable indication of alien technology come in the form of a momentary flare, powerful enough to be observed, but too short to question? The ...

China's reusable Shenlong space plane launched on its fourth space mission earlier this month. What is it doing in Earth ...

There’s a thin layer of human-made stuff enrobing the planet. A data dive into the anthroposphere. Earth’s a medium-size rock ...