For those who have mastered the basics, but still want to get their space-time continuum on.
What's next?
Warning: Advanced topics ahead. Proceed at your own risk.
Or, you know, don't. We won't judge.
Einstein 1915: "Gravity is a wave, man."
Still confused? Don't worry, we all are.
Just remember:
Waves are like... waves.
Gravity is like... gravity.
Math is like... math.
That's it. That's the secret to it all.
Or is it?
Maybe just try the Advanced Topics page.
Einstein 1916: "Gravity is not just a wave, it's an existential crisis."