In a talk at the SALT I Connection 2023 conference, Professor Garry Nolan of the Stanford University School of Medicine asserted that extraterrestrials have been coming to Earth and living there for a long time.

China is considering launching its first near-Earth asteroids (NEAs) defence demonstration test to approach and closely monitor an asteroid before impacting it to adjust its orbit around 2030, according to a top expert in the nation's space business.