Megalodon may have grown to larger sizes in cooler waters: US study

US study revealed Otodus Megalodon, world's largest shark that lived upto 3.6 million years ago may have grown to larger sizes in cooler waters than in warmer areas. "Our findings suggest a previously unrecognised body size pattern following a geography-driven ecological pattern..." said study co-author Kenshu Shimada. Team added the species that lived in cooler areas were 18-20 metres long.