I came across this quote from Rob Webb, and it really made me stop and think. He was talking about the decay of Earth’s magnetic field, and honestly, it might be one of the strongest scientific arguments for a young Earth I’ve seen.
We know for a fact that the Earth’s magnetic field has been steadily weakening for the last 150 years. That’s measurable. You can track it. So if we can measure how much it’s decaying now, we can also project that rate backward. And if you do that, the field would have been way stronger in the past. That part isn’t speculation. That’s just the math.
Now here’s where it gets interesting. If you go back 10,000 years, the field was stronger, sure, but still within a range that life could survive. No problem there. But if you keep going back to a million years or more, like the standard evolutionary timeline says then the magnetic field would have been insanely powerful. Like, lethal to living organisms. It would have disrupted the ozone layer, fried cells, and made life as we know it impossible.
That’s where the tension really shows up. Because either life has been here for billions of years, or the magnetic field has been decaying for billions of years. But you can’t have both. One of those ideas has to give. Because if the decay rate has been steady, then the field shouldn’t still be here. And if the field has been around long enough for evolution to happen, then it couldn’t have been decaying like this the whole time.
Mainstream science tries to resolve this with something called the "geodynamo theory". That says the Earth somehow regenerates its magnetic field through motion in the core. But that’s still just a theory. It’s full of assumptions and there’s no way to test it directly. We’ve never seen it happen. It’s more like a patch than a solid explanation.
On the other hand, if the Earth is just a few thousand years old, like the Bible teaches, then all of this lines up. The field started strong, and it’s been gradually weakening ever since. Life didn’t have to survive through some crazy, destructive magnetic environment. It was created into a world that was already balanced.
So you really do have to choose. You can’t say the field has been decaying slowly over millions of years and also say that life has existed here that whole time. One of those stories has to go. And the more I look at it, the more it seems like the magnetic field isn’t the problem.
According to the data, about 2,800 years ago, the field was twice as strong as it is now. Go back 5,600 years and it was four times stronger. If you keep that curve going, you hit a point pretty quickly where the field would’ve been so intense that it would break down cellular structures and prevent life from even forming.
That’s a hard stop. You can’t just explain that away. The field tells a story. And it might not be the one that mainstream science wants to hear, but it’s consistent, measurable, and actually fits the young Earth model really well.