Nature & Wildlife
Gray Whale – Greatest Endurance Athlete in the World?
Humans, eat your heart out—in the animal kingdom, there are many endurance athletes! The monarch butterfly flies 3,000 miles to its winter grounds in Mexico. Caribou (also known as reindeer), which are found in the northern parts of Europe, Asia and North America, can travel up to 3,100 miles (5,000 km) in search for food.