Researchers: F. primaevus’ powerful shoulders and elbows that are similar to today’s living burrowing animals … Furthermore, the animals found were a mixture of multiple mature adults and young adults, suggesting these were truly social groups as opposed to just parents raising their young.
So was there a single “ancestral mammal” or is it a common design (convergent evolution)? Either is quite plausible today.
If even the splitting of mammalian germ cells is not certain… maybe the 21st century would be better suited to questions in science than answers. It’s easier to get good answers when we have enough knowledge to get the questions right.
Maybe you didn’t even know they were out there but the hidden camera catches them.
At Nature: “This avalanche of discovery is also stirring up debate: some researchers disagree over which fossil groups are true mammals and the shape of the mammal family tree.”
Now, will those remains bolster textbook Darwinism or help sink it? Or in-between? We shall see.