White sharks and tuna travel for thousands of miles before returning to the same hot spot just as salmon do when they return to the same stream. These journeys are the marine equivalent of wildebeest migrations that take place on the Serengeti plain in Africa.

Sharks are being driven to extinction because people want to eat their fins and their flesh.

I think becoming a scientist is the product of parents who gave me enormous opportunities to master nature.

Human technology has made it to Mars. We are transmitting gorgeous pictures from it. Yet we have not explored our own planet. Two-thirds of it is covered with oceans that are still mysterious places.

I always liked movies, so I started writing for Hollywood, but my day job was physics.

I majored in political science and speech communication.

Books is our main type of content, but we include user-generated content and will include other verticals such as scientific papers, sheet music, and comic books.

The citation for the 1971 Nobel Prize in Chemistry reads, 'for contribution to the knowledge of electronic structures and geometry of molecules, especially free radicals,' and therefore implies that the Prize has been awarded for a long series of studies extending practically over my whole scientific life.