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CRYSTAL RIVER, Fla. - Most paleontologists look into the mouth of an allosaurus and see a prehistoric eating machine with a jaw full of flesh-tearing teeth. Peter DeRosa peers into that mouth and sees the hand of God. Working from a business park about 80 miles north of Tampa, DeRosa and his family are hammering away at two bedrock principles of modern science: evolution and the notion that Earth is about 4 billion years old. The DeRosas are part of a small but growing band of creationists using dinosaurs -- the icons of an ancient Earth -- to argue that...

How big is a black hole? ------------------------ There are at least two different ways to describe how big something is. We can say how much mass it has, or we can say how much space it takes up. Let's talk first about the masses of black holes. There is no limit in principle to how much or how little mass a black hole can have. Any amount of mass at all can in principle be made to form a black hole if you compress it to a high enough density. We suspect that most of the black holes that are...