There's no proof for any hypothesis regarding the origins of humans, scientific or religious. Nobody knows.
At this point in human history, I think the question of whether or not humans appeared on Earth "all of a sudden" is less important than the very real possibility that humans may soon disappear from the earth "all of a sudden".
No, i don't see humans surviving forever.
Science says the Earth's diverse plant and animal species are going extinct at alarming, unprecedented rates due to human activities. Science says the human species has already experienced five near extinction events in the past that only a few hundred or thousanAd humans survived. No scientist has made any predictions about a 6th human extinction event being imminent and won't. However, scientists are closely monitoring the continuing rise of greenhouse gases, glacial melts, rise of sea levels, weather patterns, rainfall, deforestation, land desertification, degradation of aquifers, and NO scientist is saying everything is going to be just fine.....
Wow, Zit! What a frighteningly ignorant and unenlightened thing to say. That there are Human Beings on the planet from supposedly advanced civilizations who are still this ignorant of the facts is very sad. I am sorry for you. Take comfort in the knowledge that you would make a great Poster Child for the 'Too Much Religion is a Bad Thing' movement.