

While there are a lot of parenting books, it’s only in the last few years that it has been properly studied, scientifically. My generation of parents is one of the first to be able to truly make use of the advancements.
Basically, it wasn’t that handbooks didn’t exist (when the episode was made), but that they contradicted each other.









We do, light travels 1 lightsecond per second.
Oh, and 1 lightpicosecond is around 2.998mm.
100 lightpicoseconds is also very close to 1’.