Stephen Hawking warned of danger of contacting aliens with superior tech, saying they could destroy humanity; others say advanced civilization would already know of our existence

Family of the late physicist gives breathing machine to medical center in Cambridge where he received treatment, so it can be used for COVID-19 patients

NY financier accused of sex trafficking of minors was interested in eugenics, would surround himself with top scientists who entertained his 'half-baked' ideas, New York Times says