I dislike this 'crowdsourcing' of philosophy. If you want a profound answer you have to search for the profound person who can give it first. I wonder if anyone mentioned "What is a question" as an answer.
To be fair, these aren't random people off the street; it's crowdsourcing from a pool of interesting people chosen by a fairly proven editor. (That, and a policy of answering questions by finding the single person who can grant absolute truth is surely worse.)
most of them are scientists giving a scientific question of their interest as the last question. it's like a classified listing. a debate would be a better format.