Today, the Hang Seng index in Hong Kong fell two point nine percent and Japan's Nikkei fell four point two percent. But it's not just Asian markets picking up a psychological cue from New York. The BBC's Duncan Bartlett has been watching this from Tokyo.
Click play above the hear the whole interview.
Bill Nye, "the science guy," and Creation Museum founder Ken Ham will challenge each other's views. Their conversation will be webcast live from Kentucky. The idea for the debate arose after Nye posted a video warning against teaching creationism to kids and Ham responded with a video of his own.