Search for Life Doubts over signs of alien life on exoplanet K2-18b are rising: ... How to calculate the odds that an alien spaceship has been spotted. News. By Anders Sandberg published 23 June 2021 ...

Scientists have hit back at “outlandish” claims that a cigar-shaped interstellar body zooming through our solar system might have been sent by aliens to spy on us. Experts from Harvard … ...