"HUMANS are not alone in struggling to stay slim. Some planets go through a "fat" stage that swells their waistlines temporarily, which possibly explains why some gas giants are unexpectedly large. "Astronomers have found a lot of planets whose sizes cannot be explained by standard theory," says Laurent Ibgui of Princeton University. The difference between predicted and measured widths of so-called "hot Jupiters" can be 30 per cent or more." - Steven Perez from Bookmarklet