A research paper, published in the International Journal of Astrobiology, states that Earth may have been sending bacteria-carrying dust particles out into space for billions of years.
The SETI Institute is the latest to confirm what scientists have long suspected: the interstellar 3I/ATLAS comet is not an alien spaceship.
Once small enough, these technograins might gain a trip out of its host solar system by a solar wind that overcomes the star's gravity holding it back. These motes of dust are then free to roam the ...