There is hard evidence for evolution.
However there is no evidence that living creatures spontaneously come into being. Regardless of whether they're complex or simple. Doesn't happen.
And see.. If you spent a little more time on science and life and biology and evolution you would know there is no theory in which life spontaneously happens..
But let's speculate shall we??
What is to say that life didn't tag along one of the many meteors or astroids that slammed into our planet?? Possible isn't it??
Oh but your gonna say there is no animal that can survive space and re-entry right.. Let alone the explosion from slamming into earth..
Behold!! A tiny creature you knew nothing about until now.. Are you ready??
Tardigrade - Wikipedia, the free encyclopedia
A water bear..
Some can survive temperatures of -273°C, close to absolute zero,[5] temperatures as high as 151 °C (303 °F), 1,000 times more radiation than other animals such as humans, can live a decade without water, and even the vacuum of space.
Yup.. That will take it through space, re-entry, and landing easily.. The issue here is this.. This is one possible explination..
And with one possible explination, there could be many more.. It is unlikely that man will travel back in time and find out how life started on our planet.. But it is very likely that it started in this manner.. So.. Life doesn't have to spontaneously appear.. There are other possibilities..