Panspermia | Life's Interstellar Journey to Earth

They landed four billion years ago when Earth was just forming. 

And they weren't humanoids with tall, slender bodies and dark, almond-shaped eyes. The aliens were microbes, and they were delivered here.

And once these aliens awakened in our mineral-rich world, they multiplied quickly and evolved.

If you want to see these aliens for yourself, it's actually very easy.

Just look in the mirror.