This book takes me back to conversations at the university café and sharing our favorite parts of new lectures that week. The best lectures left us with ample space to question, investigate and just keep digging and would lead to hours of conversation, debates and throwing our own theories up in the air for someone to expand upon.

Now, in the case of Astrophysics, the mystery that keeps on giving remains Lambda
Dear, dear Dark Matter you mysterious entity you; will we actually see you in our lifetime? Will we actually lay eyes on you or, in the words of Neil deGrasse Tyson:

"For now, we must remain content to carry dark matter along as a
strange, invisible friend, invoking it where and when the universe
requires it of us."

At least we all, almost 8.5 billion people share the same invisible friend.