When we last looked at Curiosity — What’s Inside the Cube?, we were curious to know why half a million people were compulsively working together to tap and destroy the imaginary green cube in this iPhone app.

A few months later, they haven’t stopped. In fact, ten times that many people are now taking part in this “experiment.” Some are drawing crude pictures on the cube’s surface. Others are just trying to break the cube and get to its center. Still others are paying real money in an attempt to thwart them by adding layers back onto the cube. Today, its developer told Wired that just 50 layers of the cube now remain.

The end is near. But what happens when Curiosity‘s cube is gone?

After Billions of Clicks, Players Near the Center of Peter Molyneux’s Cube | Game|Life | Wired.com.