(Image credit: NASA/JPL-Caltech/University of Arizona) Scientists revisiting a mysterious signal from the south pole of Mars have suggested a new potential explanation, and it doesn't bode well for hopes of finding liquid water on the Red Planet.

Nuclear power is going mini. Former SpaceX engineers are creating a portable microreactor that is lightweight and cost-effective, calling it the "world's first portable, zero-emissions power source." It was originally a project imagined for Mars, but the team decided Earth needed it more (or, at least, sooner).

KB: We asked ourselves, "what obliquity, what misalignment would Planet Nine induce in the solar system?" because it must induce some. We know that Planet Nine's orbit in inclined. As a result, when Planet Nine torques the rest of the solar system, the two sort of act as two precessing tops.

The Perseverance Mars rover landed safely yesterday, but only after a series of complex maneuvers as it descended at high speed through the atmosphere, known by the team as the "seven minutes of terror." NASA has just shared a hair-raising image of the rover as it dangled from its jetpa...

The moment when the first human sets foot on Mars is becoming ever-closer. The 140 million mile distance between Earth and the Red Planet is set to be breached within the next two decades, Nasa predicts.

Has the State of Israel made contact with aliens? According to retired Israeli officer and current professor Haim Eshed, the answer is yes, but this has been kept a secret because "humanity isn't ready."