Page 188. " I could make out one of the strange, fish-shaped craft that I had dreamt of in my childhood, hanging in the sky "
Leonardo da Vinci produced a design for a basic form of helicopter in the 1480s (left), but it was not the early twentieth century that working helicopters were built.
Page 192. " Her hair was just a little darker than Rosalind’s, and, astonishingly in a woman, it was short "

In 1927, the singer Mary Garden cut her hair short and wrote an article explaining why:

I consider getting rid of our long hair one of the many little shackles that women have cast aside in their passage to freedom.

This statement was one of the many reasons why women began to cut their hair short from the late 1910s and early 1920s onwards.

Page 195. " Did you ever hear of the great lizards? When the time came for them to be superseded they had to pass away "
Creative Commons Attribution Share AlikeDinosaur - Credit: InfoMofo

The dinosaurs (literally "fearfully great lizards") were giant reptiles that lived on Earth for over 100 million years from the late Triassic period (about 230 million years ago) until the end of the Cretaceous period (about 65 million years ago).

They became extinct due to some sort of catastrophic event, possibly an asteroid impact.