Sharks are almost everywhere -- Sharks have survived five mass extinctions -- Sharks can be very small or very large -- Shark babies eat one another -- Sharks top the food chain -- Sharks have seven senses -- Sharks are always looking out for their next meal -- Sharks feast on a buffet -- Great whites are massive meat eaters -- Sharks are not man-eaters -- Sharks inspire new ideas -- Sharks help balance ecosystems -- Fact sheet.