Marine fish won an evolutionary lottery 66 million years ago
(PHYSorg.com Archaeology & Fossils)

Why do our oceans contain such a staggering diversity of fish of so many different sizes, shapes and colors? A UCLA-led team of biologists reports that the answer dates back 66 million years, when a six-mile-wide asteroid crashed to Earth, wiping out the dinosaurs and approximately 75 percent of the world`s animal and plant species.