No matter how hard we may try, we can only travel forward. The relativistic laws guarantee it. - Kip S. Thorne

The environment near Gargantua will become more dangerous for individual life forms, including humans, promoting faster evolution if enough individuals survive.

The French translation of ‘a black hole has no hair’ is so obscene that French publishers resisted it vigorously, to no avail.

El cálculo, la teoría de variable compleja, la teoría cualitativa de ecuaciones diferenciales, la teoría de grupos y la geometría diferencial estaban cubiertas;