The monarch butterfly, for example, has a brain that is only about the size of the tip of a ballpoint pen. Yet, that butterfly has the ability and skill to migrate some 1,800 miles (nearly 3,000 km) from Canada to a particular forest in Mexico, using the sun to help it navigate.
Тэгсэн атлаа Канадаас Мексикийн ой хүртэл 3 000 орчим километр зам туулахдаа нараар баримжаалан нисэж зүг чигээ алдалгүй нүүдэллэж чаддаг.