“Opinion is divided about how future extraterrestrial visitors should be greeted. Under the Outer Space Treaty on 1967, which Unoosa oversees, UN members agreed to protect Earth against contamination by alien species by “sterilising” them.
Mrs. Othman is understood to support a more tolerant approach.
But Professor Stephen Hawking has warned that alien interlopers should be treated with caution.
He said: “I imagine they might exist in massive ships, having used up all the resources from their home planet. The outcome for us would be much as when Christopher Columbus first landed in America, which didn’t turn out very well for the Native Americans.””