Goldfish possess genetic traits that allow them to swell up to four pounds—the size of a Chihuahua. Experts say that's why ...

The huge monster-sized animal, measuring over 100 feet across, isn't a fish or even a marine mammal like a whale. It's a ...

Megalodon may have been up to 80 feet long, but the colossal extinct shark was also probably thinner than scientists ...