Earthworms reproduce through a unique copulation process whereby two worms line up against each other and excrete a type of mucous that forms a layer that encapsulate their bodies. Both worms release sperm into the mucou... More »

Earthworms do not have eyes, but they are equipped with cells that can sense changes in the intensity of light as well as cells that can respond to and measure touch. Earthworms are very primitive organisms who do not ne... More » Pets & Animals Bugs Worms

Earthworms breathe air through their skin, which diffuses oxygen from the surrounding environment. Moisture is vital for the earthworm, as it allows oxygen to be retained while carbon dioxide is expelled. The mucus secre... More »

The typhlosole in earthworms increases the surface area of the intestine for efficient secretion and absorption during digestion. It is named for the Greek word for "blind pipe," and the typhlosole can be defined as an e... More »

Over time, earthworms have developed several structural, physiological and behavioral adaptations through evolution. These beneficial features have allowed them to become better suited to their environment. More »

As of 2015, there are about 34,000 known worm species in the world, including about 2,700 kinds of earthworms. Most worms are small, but the largest species, the African giant earthworm, can be up to 22 feet in length. M... More » Pets & Animals Bugs Worms

Experts say that most earthworms were imported from Europe to North America by settlers. To stabilize their ships, settlers loaded them with soil that contained earthworms and their cocoons. Glaciers had destroyed most n... More »