Adjective patterns with what
The 'interesting' group
These adjectives indicate that something is interesting or surprising. The wh-clause usually begins with how.
interesting puzzling remarkable striking surprising
What is interesting is how enthusiastically the acting head was fulfilling his role.
What's even more puzzling is why dinosaurs lasted as long as they did and how they managed to colonize such widely different parts of the world.
What is just as remarkable is how often we set our brains to work in a very limiting or blinkered way.