Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
--------
Question: Plankton is the most common life form in the ocean.

Answer: What is the most common life form in the ocean?

Question: Particle accelerators can nuclear fusion in stars be simulated.

Answer: How can nuclear fusion in stars be simulated?

Question: Human evolution shows that evolutionary changes typically occur at a slow pace.

Answer:
Human evolution shows that evolutionary changes typically occur at what pace?