“Humans contain ‘alien’ genes not passed on from our ancestors, researchers have discovered.

The say we acquired essential ‘foreign’ genes from microorganisms co-habiting their environment in ancient times.

The study challenges conventional views that animal evolution relies solely on genes passed down through ancestral lines – and says the process could still be going on.”

Read more: http://www.dailymail.co.uk/sciencetech/article-2994187/Mystery-alien-genes-Scientists-discover-DNA-NOT-ancestors-say-change-think-evolution.html