If the scientists are right, a NASA spacecraft brought stuff from outside the solar system back to Earth. The Stardust spacecraft, which was originally tasked with chasing after Comet Wild 2, brought our planet seven grains that look fluffier than expected. While the scientists say that more tests are needed to determine these particles originated … Continue reading "How A Comet-Chasing Spacecraft ‘Likely’ Brought Interstellar Dust Back To Earth"