Because we can see it happen with our own eyes. We dug out bones that look human, yet are different from ours, and actually more closely resemble apes. But this different species is nowhere found on earth anymore. What else could it be that this was how humans looked like thousands of years ago?


Fascinating it is for sure, but if we look to the past, there were many many more things that were not understood, thought to be so complex it's beyond our capability to understand, and thus a designer must've created it.

Remember the Earth was once flat.

But now we know it's not flat, there's no designer behind a flat world. Because there's no such thing as a flat world.

Why can't it be that, once we figure out how the brain works, the brain actually works so much different than we thought, it all makes sense, and is not complex anymore? As this way has proved to be quite common in the past...
If we figure it out, all of a sudden there's no designer anymore, and the designer seem to have "moved" to the more abstract and complex things that have risen by new findings.

God made everything a few thousand years ago!
*scientists prove otherwise*
Oh. well, God made everything a few million years ago!
*scientists prove otherwise*
No, wait, God made everything some billion years ago, and triggered evolution!
*scientists prove otherwise*
God triggered the Big Bang?
*scientists sigh*

This is how it's going for dozens of years. Religions come up with ideas, scientists with theories and proof. Why is it that the ideas are taken more serious than the proof? Why not base the ideas on the proof, and accept that they may change any time? It's fine to believe God is involved somehow, but why are religious people *spare the exceptions* so sure that NOW is the time they really know the answer?