General News
Three reasons aliens may struggle to reach Earth even at light speed
Even if alien civilizations exist, there are clear physical constraints that could keep them from visiting Earth, a researcher said. Carol Oliver of the University of New South Wales’ Sydney campus cited three reasons: the immense distances in space, the enormous energy required for interstellar travel and the potential dangers of Earth’s environment to non-adapted life. She also said the limited reach and short history of human observations make the lack of contact unsurprising.
