1.5 billion
Granite and gneiss originate from magma from Earth’s interior
1.4 billion
Climate cycles established
1.3 billion
Earth’s solid interior core is formed
1.2 billion
Sexual reproduction originates
An egg rolls off the table, falls to the ground, and smashes. But then suddenly it comes back together again, the yolk forming into a ball, the white gathering round it, and the shell joining back into place.
It sounds ridiculous. Everybody knows that eggs smash, but they don’t join back together again. Time’s arrow goes in only one direction – forwards.
But is this necessarily so? Not according to physicist Carlo Rovelli. If we take a look at the universe’s basic constituents and laws, we will not find time there at all, he says. For
