Love and Relativity is an epistolary short story being read from the perspective of a long lost husband and father, on his wife's despairs and his daughter's journey to find him. It's a good estimation on the consequences of the paradoxes brought on by Einstein's theory of Special Relativity.

Maybe love, just like timespace, transcends human understanding.

Here's a question. When you've figured out how the building blocks of universe works, what's the first thing you do with that knowledge? The obvious answer: make better versions of the universe itself. Humans have been doing that since the dawn of civilisation: we built monuments using, at first, stone, then bricks, then concrete, and finally steel.

Making better things had always been the prime mover of our ascent to civilisation. And we're still doing it today. That's where material sciences come into play...

Contrary to what you may believe after reading Part 4, classical physics never went obsolete. It simply could not be used answer certain questions that had emerged out of late 19th century discoveries. See it like mathematics, you can't possible solve a multi-variable differential problem with only simple arithmetics, you need calculus for that.

And similar to calculus, modern physics became more esoteric and mathematically abstract. But we'll try our best to simplify it.

One of the oldest engineering problems of humanity is how to get to the other side of a river, gorge or any particular gap-based obstacle. Needless to say one of the oldest professions out there is therefore the humble engineer, a job with probably the most overlooked impact to our lives.

This article wouldn't explain everything involved in bridge-building, but it explains enough to that the next time you came across a civil engineer you might get an idea of how he or she thinks in terms of problem solving.