Charles Darwin studies the earthworms and the pigeons. Charles study the earthworms because he was a naturalist, an expert in geology. He was very fascinated by earthworm behavior. He tested intelligence, food preferences, and sensitivity to noise, light and sound. Darwin’s father knew he couldn 't do this experiment, so Charles had to prove him wrong. He tested the worms by putting them under a lamp of a candlelight and their sensitivity by holding “a poker heated to full redness near some worms”. He studies the pigeon because their breeding was an ancient pastime even in the 1850s. Darwin joined two London pigeon clubs and attended pigeon competitions. He made a meticulous measurement of their skeleton and marveled at the breed’s different