Bees can build hexagonal hives, red-crowned cranes can migrate in herringbone, cobwebs can form gossip shapes, and cats can hold their bodies together when they sleep in winter. These are not the best. The real genius of animal mathematics is coral! It writes a "calendar" on its body, and draws 365 stripes on its body wall every year, showing that it "draws" one a day, which is really amazing. Paleontologists found that corals 350 million years ago "painted" 400 stripes every year. Astronomers say that at that time, the earth only had 2 1.9 hours a day, and a year was 400 days instead of 365 days. Is animal talent high enough?