Rumours swirl that Donald Trump will reveal evidence of extraterrestrial life in a July 8 speech, reigniting UFO speculation and backlash.

For decades, scientists have been actively searching for signs of extraterrestrial life. Fromradio waves to laser flashes and infrared heat signatures, the hunt for alien technosignatures has captivated both researchers and the public.

YouGov, a research and analytics firm, found last year that most Americans believe in aliens. Its poll results showed in November that 56% of adults, including 61% of Democrats and 46% of Republicans, said there is extraterrestrial life.