That's non-controversial, regular knowledge right? That the proto iron age happened all over in 1 or 2 centuries in which meteors dropped iron from the sky. It was in regular history books when i was a kid.
They always brush right over why it was raining iron. Isn't that crazy wth is that about?
To be honest, I'm also confused as to why they say the core is made of iron and nickel, when lead,gold or uranium are far denser.
The whole planetary evolution is bunk like the BB it's tied to. You aren't supposed to know layers are added at regular intervals. Look at the half-lives of un-stable elements (those with half-lives). Don't exactly jive with a 4 billion year old planet does it.