text:  Scientists have confirmed a cave on the moon not far from where Neil Armstrong and Buzz Aldrin landed 55 years ago this week. Researchers suspect there could be hundreds more caves and tunnels that could house future astronauts. An Italian-led team reports today that there's evidence for a sizable cave accessible from the deepest known pit on the moon. China says its economy expanded at a slower than forecast 4.7% annual rate in the last quarter.