They're only mysteries when you rule out the obvious Solution

"Unsolved scientific mysteries don’t have to be large-scale questions about the nature of the universe," wrote someone named Thor Jensen, long enough ago that I've lost the original reference. "They can be closer to home--such as the centuries-long investigation into why cats purr. The soft rumbling noise is typically made as an expression of happiness and contentment, but cats also emit the sound when  they’re upset or recovering from injury ... Even more puzzling is how they purr--there’s no specific organ that makes the sound, and the best theory we have is that it’s a result of contractions of the larynx around the vocal [chords]."

And that's just the start. It seems that there are more unsolved mysteries in this world than solutions, beginning with the origins of all that mystical, mythical compressed matter that supposedly erupted, via a mysteriously caused Big Bang, into everything in the universe. (No word on where space came from.) Then there are puzzles about phenomena from human fingerprints to the distribution of prime numbers to the existence of gravity and free will.
 
So here's my question: How is it that so many people--allegedly a growing majority, including a grand proportion of our intelligentsia--are trusting their eternities to the word of scientists who can't even explain how cats purr? We're talking about the most critical whodunit of our lives, and the atheists' bumbling Hercules Poirots are turning a blind eye to the obvious Suspect.

If you're looking for the solution, open the nearest Bible; you'll find it thoroughly explained in the very first sentence, AKA Genesis 1:1.