First, they'd need to find Earth from afar, either by watching our sun wobble as the planet's gravity tugs against it, or by seeing the sun dim as Earth blocks a tiny fraction of sunlight during its orbit. read more
Aliens have been visiting our planet for thousands of years. Some apparently have needed to use helmets, giving the great many drawing and carvings found all over the world depicting odd looking humanoids with helmets on. read more
Professor Conway Morris claims that as a result of this, life on other Earth-like planets would follow similar evolutionary paths to those on our own planet. nasa boss believes in aliens The Administrator of Nasa, Charles Frank Bolden Jr, has said he believes there is life outside of Earth. read more