物理定律能否统一? Can the laws of physics be unified?

地球内部如何运行? How does the inside of the Earth work?

重力的本质是什么? What is the nature of gravity?

驱动太阳磁周期的原因是什么? What is driving the solar magnetic cycle?

使地球磁场逆转的原因是什么? What is the reason for reversing the Earth’s magnetic field?