I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.

如果生者不让死者安息，死者就不会安息。

Collaboration is key—governments, businesses, and communities must work together for sustainable forests.