While cleaning the top layer […] spotted […] hominin footprint […] interpreted the depositional setting of the footprint surface, narrowing down the passage of the track makers to a few hours […] Homo erectus [persisted for 1 million years more] and Paranthropus boisei [went extinct within the next few hundred thousand years], the two most common living human species of the Pleistocene Epoch [2 580 000 to 11 700 years ago…] “The idea that they lived contemporaneously may not be a surprise. But this is the first time demonstrating it.”
If you think your grandparents would prefer the Windows 8 or macOS type UI, then GNOME is the way.
I think Xfce or MATE is vastly better tho.