, has been scouring the floor of the Pacific Ocean with an "interstellar hook," a tentacle-like contraption, to look for pieces of a meteor dubbed IM1 that is suspected to have come from interstellar space.last month, Loeb argued that recovered "metallic spherules" may represent technology from an alien civilization, no matter how far-fetched that may sound."We have an abundance of interstellar material on Earth," she wrote in her piece.
This material is made up of "tiny diamonds or sapphires" shot into interstellar medium by evolving and exploding stars, which were "eventually carried to Earth in meteorites."Loeb's evidence that the spherules contain nickel, and therefore could have interstellar origins, is "shaky," Grady argued. The presence of nickel "merely makes it more likely that they’re terrestrial pollutants.
"The most convincing evidence would be to measure an age for the spherules greater than that of the Sun," Grady wrote, "which would identify them as interstellar." "And that would be amazing, but it would not necessarily identify them as having an artificial, rather than natural origin," she added. "I am not sure what evidence would be sufficiently convincing for this — maybe the autograph of the alien engineer who built the spacecraft?"