Do Scientists Actively Believe That Everything Has An Explanation?

Of course everything CAN BE EXPLAINED. The problem is in observing it.
Much of the universe is open to electromagnetic inspection, but not enough of it. Until we can inspect something it is very hard to do anything other than deduce that explanation from the events that surround it.

BUT THATS NOT THE POINT.
The point you’re probably getting at, and the one science exists to expose, is the use of comforting or appealing, or satisfying LIES to fool people.

https://www.quora.com/Do-scientists-actively-believe-that-everything-has-an-explanation