Science works by first speculating. Then it looks for ways to verify or negate those speculations. Then it actually goes out into the world to see what happens. Then it modifies any speculations to conform with what was seen.
So, yes, Darwin speculated that bears were similar to the original species. That line of speculation didn't hold up to the evidence. So whales did not evolve from the ursines (bears). But when more fossil evidence appeared, it became clear that whales *did* evolve from the ungulates. That is where the evidence is. Whales evolved from the ungulates.
The issue isn't speculation. The issue is whether evidence shows up that either supports or negates that speculation and whether that speculation is something that *can* be challenged by the evidence. The difference between science and religion is that science requires its speculations to be testable and actively goes out to try to show them wrong. Those speculations that survive the evidence and those attempts are held, tentatively, until new evidence is found. We eliminate the falsehoods and keep whatever is left over as more likely to be true.
I'm glad that you brought it up. About Scientist and Religion.
First you would need a Scientist who believes in evolution, to be supportive of evolution.
You can not take a person who has no knowledge or understanding about evolution, to give the right answers about evolution.
Let's say, to take a Christian and have them go into evolution and they come out denouncing evolution. How many people do you think would support them on their findings, even here in RF how many people would support them on their findings.
So in like manner, When I hear people say, that people have found the bible as being false.
The first question that comes to my mind is who was those people, I'm sure they were not Christian.
You can not take a person who has no knowledge or understanding about the bible to give the right answers about the bible. It would be very doubtful that those who believe in the Bible,would take their word at all.
Just like you wouldn't take a person who has no knowledge or understanding about the Science of Evolution to give the right answers about evolution. And it would be very doubtful that those who believe in evolution would take their word at all.
So what we have here is, people who have no knowledge or understanding about Science of Evolution, and people who have no knowledge or understanding of the Bible.
Trying to explain the workings of Science of Evolution.
Trying to explain the workings of the Bible.
I am not trying to be critical or criticize anyone.
Just telling it the way it is.