Respuesta :
Answer:
Comets
Explanation:
provide the first evidence of a comet directly impacting Earth, a new study claims. The finding may help unlock some of the mysteries surrounding the birth of our solar system. Comets shed dust as they roam the solar system. These 'break ups' result in numerous small particles and fragments, called meteoroids, which orbit the sun
Answer:
My guess would be microbes such as bacteria or other microorganisms
Explanation:
Microbes are hard to kill. They can survive in harsh conditions, so an asteroid impact would barely do any damage for them.