Harvard astronomer Avi Loeb scoured the Pacific seafloor last summer in search for debris from a meteor that had exploded in a fireball on Jan. 8, 2014. Based on its astonishing speed, he suspected the object came from beyond our solar system — and might even be evidence of alien technology. But reanalysis of seismic data now suggests he may have been looking for the meteor remnants in the wrong place. Aliens are a tough sell among scientists these days even if they are