Professor Stephen Hawking keeps on seeing threats here and there. Recently he again warned us of the danger of trying to contact aliens.
He thinks there might be life on Gliese 832c, an exoplanet that orbits a red dwarf star some 16 light years from us. It is five times as big as Earth and has a year (i.e., the length of one orbit) that lasts a mere 36 days.
Last year, Professor Hawking launched the $100 million Breakthrough Listen initiative with Russian tycoon Yuri Milner with the aim of finding extraterrestrial life:
“The Breakthrough Listen project will scan the nearest million stars for signs of life, but I know just the place to start looking. One day we might receive a signal from a planet like Gliese 832c, but we should be wary of answering back,” The Independent quotes him as saying.
He is afraid that the little green men might kill us off.